Test Procedure

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2019 Ford Transit-350 HD, 2019 Ford Transit-350, 2019 Ford Transit-250, 2019 Ford Transit-150, and 2019 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

J1 PRELIMINARY DIAGNOSIS

NOTE: Diagnose circuit DTCs before range or performance DTCs.

Are DTCs P00BC, P00BD, P0100, P0101, P0102, P0103, P02EC, P02ED, P1102, P1103, P2073 or P2074 present?

Yes	No
GO to J2.	For symptoms without DTCs, GO to J2. For all others, RETURN to SYMPTOM CHARTS for further direction.

J2 CHECK THE INTAKE AIR SYSTEM FOR CORRECT INSTALLATION, DAMAGE, LEAKS OR RESTRICTIONS

NOTE: Visually inspect the vehicle for aftermarket accessories and performance modifications (exhaust system, turbocharger, performance chip). Refer to ENGINE CONTROL (EC) SYSTEM , Modifications to OBD Vehicles.

NOTE: All PIDs may not be available on all vehicles.

Ignition OFF.
Check all the intake air system components for correct installation, damage, leaks, or restrictions. Refer to the Intake Air Distribution And Filtering article and Electronic Engine Controls article, removal and installation procedures for correct installation of the intake air system components.
Check the throttle body bore for sludge.
Check the crankcase ventilation system for leaks or restrictions.
Check the charge air cooler (CAC) system for leaks or restrictions.
Access the PCM and monitor the MAFLRN_AIDLE (NUM) and MAFLRN_IDLE (NUM) PIDs.
Record the PID values.

Is a concern present?

Yes	No
REPAIR as necessary. For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test. For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.	GO to J3.

Yes

REPAIR as necessary.
For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test.
For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

GO to J3.

J3 CHECK FOR VOLTAGE AT THE SENSOR

NOTE: All PIDs may not be available on all vehicles.

MAF/IAT Sensor connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) MAF/IAT Sensor Connector, Harness Side	(-)
VPWR - Pin 3	Ground

Access the PCM and monitor the MAFLRN_AIDLE (NUM) and MAFLRN_IDLE (NUM) PIDs.
Record the PID values.

Is the voltage greater than 10.5 V?

Yes	No
GO to J4.	REPAIR the open circuit. For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test. For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

Yes

GO to J4.

REPAIR the open circuit.
For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test.
For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

J4 CHECK FOR AN OPEN

NOTE: All PIDs may not be available on all vehicles.

Ignition OFF.
For Transit,
PCM-T connector disconnected.

Measure the resistance between:

(+) MAF/IAT Sensor Connector, Harness Side	(-) PCM-T Connector, Harness Side
MAF - Pin 5	MAF - Pin 24
SIGRTN - Pin 4	SIGRTN - Pin 15

For all others,
PCM-B connector disconnected.

Measure the resistance between:

(+) MAF/IAT Sensor Connector, Harness Side	(-) PCM-B Connector, Harness Side
MAF - Pin 5	MAF
SIGRTN - Pin 4	SIGRTN

Access the PCM and monitor the MAFLRN_AIDLE (NUM) and MAFLRN_IDLE (NUM) PIDs.
Record the PID values.

Are the resistances less than 5 ohms?

Yes	No
GO to J5.	REPAIR the open circuit. For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test. For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

Yes

GO to J5.

REPAIR the open circuit.
For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test.
For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

J5 CHECK FOR A SHORT TO GROUND

NOTE: All PIDs may not be available on all vehicles.

Measure the resistance between:

(+) MAF/IAT Sensor Connector, Harness Side	(-)
MAF - Pin 5	Ground

Measure the resistance between:

(+) MAF/IAT Sensor Connector, Harness Side	(-) MAF/IAT Sensor Connector, Harness Side
MAF - Pin 5	SIGRTN - Pin 4

Access the PCM and monitor the MAFLRN_AIDLE (NUM) and MAFLRN_IDLE (NUM) PIDs.
Record the PID values.

Are the resistances greater than 10K ohms?

Yes	No
GO to J6.	REPAIR the short circuit. For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test. For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

Yes

GO to J6.

REPAIR the short circuit.
For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test.
For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

J6 CHECK FOR A SHORT TO VOLTAGE

NOTE: All PIDs may not be available on all vehicles.

Ignition ON, engine OFF.

Measure the voltage between:

(+) MAF/IAT Sensor Connector, Harness Side	(-)
MAF - Pin 5	Ground

Access the PCM and monitor the MAFLRN_AIDLE (NUM) and MAFLRN_IDLE (NUM) PIDs.
Record the PID values.

Is any voltage present?

Yes	No
REPAIR the short circuit. For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test. For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.	GO to J7.

Yes

GO to J7.

J7 INTERMITTENT CHECK

NOTE: The MAF_HZ PID value fluctuates while the engine is running.

NOTE: All PIDs may not be available on all vehicles.

Ignition OFF.
MAF/IAT Sensor connector connected.
For Transit,
PCM-T connector connected.
For all others,
PCM-B connector connected.
Ignition ON, engine running.
Access the PCM and control the EGR_A_CMD (PER) PID.
Decrease the EGR_A_CMD PID to 0%.
Access the PCM and control the EGRTP_CMD (PER) PID.
Decrease the EGRTP_CMD PID to 0%.
Access the PCM and control the VGTDC (PER) PID.
Decrease the VGTDC PID to 0%.
Access the PCM and monitor the MAF_HZ (FREQ) PID.
Record the MAF_HZ PID high and low values.
Set the scan tool MAF_HZ PID graph limits 0.2 kHz above and below the previously recorded high and low values.
While observing the PID, wiggle the harness from the MAF/IAT sensor to the PCM.
Access the PCM and monitor the MAFLRN_AIDLE (NUM) and MAFLRN_IDLE (NUM) PIDs.
Record the PID values.

Does the MAF_HZ PID reading exceed the set limits range?

Yes	No
For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test. For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750, Transit and Transit Connect, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.	GO to J8.

Yes

For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test.
For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-650/F-750, Transit and Transit Connect, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

GO to J8.

J8 CHECK THE INTAKE AIR SYSTEM FOR LEAKS AND RESTRICTIONS

NOTE: Pressure above 241 kPa (35 psi) can cause damage to system components. Regulate the shop air to 137.9 kPa (20 psi) before connecting to the system.

NOTE: Remember to reinstall the manifold absolute pressure (MAP) sensor (Transit) or the exhaust gas recirculation temperature bank 1, sensor 2 (EGRT12) (all others) and remove the plastic bag from the air filter at the completion of this step.

NOTE: All PIDs may not be available on all vehicles.

Ignition OFF.
For Transit,
Remove the MAP sensor.
For all others,
Remove the EGRT12 sensor.
Place the air filter in a plastic bag to prevent air flow out the intake port and reinstall it in the vehicle.
Connect the Rotunda Smoke Machine, Fuel Evaporative Emission System Tester 218-00001 (522) or equivalent to the intake air system using the appropriate adapter for the sensor fitting.
Fill the intake air system with smoke.
Pressurize the intake air system with 137.9 kPa (20 psi) regulated shop air.
Check the intake air system for leaks and restrictions.
Access the PCM and monitor the MAFLRN_AIDLE (NUM) and MAFLRN_IDLE (NUM) PIDs.
Record the PID values.

Are any leaks or restrictions present?

Yes	No
REPAIR the leaks or restrictions. For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test. For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.	For Transit Connect with DTC P2073, INSTALL a new EGR valve. REFER to the Engine Emission Control article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For Transit Connect with out DTC P2073, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, GO to J9.

Yes

REPAIR the leaks or restrictions.
For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test.
For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-650/F-750, Transit and Transit Connect, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN AIDLE PID values between 0.00 and 0.12, Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

For Transit Connect with DTC P2073, INSTALL a new EGR valve. REFER to the Engine Emission Control article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool.
REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) .
Clear the PCM DTCs. REPEAT the self-test.
For Transit Connect with out DTC P2073, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool.
REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) .
Clear the PCM DTCs. REPEAT the self-test.
For all others, GO to J9.

J9 CHECK MAF SENSOR OPERATION

NOTE: All PIDs may not be available on all vehicles.

Ignition ON, engine running.
Access the PCM and monitor the MAF_HZ (FREQ) PID.
Access the PCM and control the EGRVPDES (PER) PID.
Decrease the commanded PID to the minimum value.
Access the PCM and control the EGRTP_CMD (PER) PID.
Decrease the EGRTP_CMD PID to 0%.
Access the PCM and control the VGTDC (PER) PID.
Decrease the VGTDC PID to 0%.
Monitor the MAF_HZ PID at idle and record the value.
Access the PCM and control the RPMDSD (RPM) PID.
Increase the engine speed to 2, 000 RPM.
Record the MAF_HZ PID value.
Access the PCM and monitor the MAFLRN_AIDLE (NUM) and MAFLRN_IDLE (NUM) PIDs.
Record the PID values.

Is the MAF_HZ PID between 3.3 to 3.6 kHz (F-150) 3.2 to 3.8 kHz (all others) at idle and 5.1 to 5.7 kHz (F-150) 5.0 to 5.4 kHz (Transit) 5.5 to 6.3 kHz (all others) at 2, 000 RPM?

Yes	No
For F-150 with DTC P2073, with MAFLRN_AIDLE values between -0.06 and 0.06, INSTALL a new EGR valve. REFER to the Engine Emission Control article. Clear the PCM DTCs. REPEAT the self-test. For F-150 with DTC P2073, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, INSTALL a new EGR valve. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750 and Transit with DTC P2073, INSTALL a new EGR valve. REFER to the Engine Emission Control article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-Series Super Duty with DTC P2073, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, INSTALL a new EGR valve. REFER to the Engine Emission Control article. Clear the PCM DTCs. REPEAT the self-test. For F-Series Super Duty with DTC P2073, with MAFLRN_IDLE or MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, INSTALL a new EGR valve. REFER to the Engine Emission Control article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, GO to J10.	For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test. For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For F-650/F-750 and Transit, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test. For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

Yes

For F-150 with DTC P2073, with MAFLRN_AIDLE values between -0.06 and 0.06, INSTALL a new EGR valve. REFER to the Engine Emission Control article. Clear the PCM DTCs. REPEAT the self-test.
For F-150 with DTC P2073, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, INSTALL a new EGR valve. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-650/F-750 and Transit with DTC P2073, INSTALL a new EGR valve. REFER to the Engine Emission Control article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-Series Super Duty with DTC P2073, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, INSTALL a new EGR valve. REFER to the Engine Emission Control article. Clear the PCM DTCs. REPEAT the self-test.
For F-Series Super Duty with DTC P2073, with MAFLRN_IDLE or MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, INSTALL a new EGR valve. REFER to the Engine Emission Control article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For all others, GO to J10.

For F-150, with MAFLRN_AIDLE values between -0.06 and 0.06, Clear the PCM DTCs. REPEAT the self-test.
For F-150, with MAFLRN_AIDLE values less than -0.06 or greater than 0.06, CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For F-650/F-750 and Transit, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values between 0.00 and 0.12, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article. Clear the PCM DTCs. REPEAT the self-test.
For all others, with MAFLRN_IDLE and MAFLRN_AIDLE PID values less than 0.00 or greater than 0.12, INSTALL a new MAF/IAT sensor. REFER to the Electronic Engine Controls article.
CARRY OUT the Reset And Clear The Specified Function MAF Sensor on the scan tool. REFER to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Clear the PCM DTCs. REPEAT the self-test.

J10 CHECK FOR CORRECT PCM OPERATION

Disconnect all the PCM connectors.
Visually inspect for:
- pushed out pins
- corrosion
Connect all the PCM connectors and make sure they seat correctly.
Carry out the PCM self-test.
Verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.