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Test Procedure

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
  1. RD1 CHECK FOR DTCS 

    Are DTCs P0139, P0140, P06EA, P06EB, P123E, P123F, P207F, P20EE, P2200, P2201, P2204, P2209, P220A, P220B, P220E, P220F, P225A, P225B, P229E, P229F, P22A2, P22A7, P249C, P2A01, U029D, U029E, U05A1 or U05A2 present? 

    Yes No
    For DTCs P06EA or P06EB, GO to RD2  .
    For DTC P207F, GO to  RK7.
    For DTCs P2200, P220E, P220F, P225A, P225B, P229E, U05A1 or U05A2, GO to  RD6.
    For all others, GO to  RD3.    		 RETURN to ENGINE CONTROLS - SYMPTOM CHARTS (DIESEL) , Symptom Charts for further direction.
  2. RD2 COMPARE THE AMBIENT AIR TEMPERATURE (AAT) SENSOR, THE EXHAUST GAS TEMPERATURE (EGT) SENSOR AND THE INTAKE AIR TEMPERATURE (IAT) SENSOR PID VALUES 
    NOTE: Allow the exhaust system temperature to stabilize to the ambient temperature for a minimum of 6 hours.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the AAT (TEMP), EGT14 (TEMP) and IAT11 (TEMP) PIDs.

    Are the AAT, EGT14, and IAT11 PID readings within 40°C (72°F) of ambient temperature? 

    Yes No
    GO to RD3  . REFER to the appropriate pinpoint test to DIAGNOSE the sensor that is out of range.
    For the AAT sensor, GO to PINPOINT TEST FA .
    For the EGT14 sensor, GO to PINPOINT TEST RC .
    For the IAT sensor, GO to PINPOINT TEST F .
  3. RD3 CHECK FOR OTHER DTCS 

    Are any DTCs present other than P0139, P0140, P06EA, P06EB, P123E, P123F, P20EE, P2201, P2204, P2209, P220A, P220B, P229F, P22A2, P22A7, P249C, P2A01, U029D or U029E? 

    Yes No
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS . GO to  RD6.
  4. RD4 CHECK THE REDUCTANT 
    • Check the quality of the reductant sample using the appropriate test equipment. Refer to ENGINE CONTROL COMPONENTS , Selective Catalytic Reduction (SCR) Catalyst for additional information.

    Is a concern present? 

    Yes No
    GO to RD5  . Drive the vehicle for greater than 16 km (10 miles) at a steady state speed.
    GO to  RD6.
  5. RD5 REPLACE THE REDUCTANT 
    • Drain and refill the reductant tank with new reductant.
    • Drive the vehicle for greater than 16 km (10 miles) at a steady state speed.
    • Carry out the PCM self-test.

    Is DTC P207F present? 

    Yes No
    GO to RD6  . The system is operating correctly at this time.
  6. RD6 CHECK FOR A SOURCE OF POTENTIAL CONTAMINATION 
    • Investigate the following items as potential sources of NOx11 sensor and NOx12 sensor contamination:
      • use of unapproved silicon sealers
      • excessive oil consumption
      • coolant leaking internally in the engine
      • use of unapproved cleaning agents

    Is a concern present? 

    Yes No
    REPAIR the source of the contamination. CHANGE the engine oil and oil filter.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to RD7  .
  7. RD7 CARRY OUT A VISUAL INSPECTION 
    • Visually inspect the NOx11 module and the NOx12 module, the NOx11 sensor and the NOx12 sensor, the NOx11 module wiring and the NOx12 module wiring and the NOx11 module ground and the NOx12 module ground connections for the following:
      • signs of excessive heat
      • damaged wiring harness or connectors
      • incorrect harness routing
      • incorrect connections
      • incorrect ground circuit connections to the frame
    • Visually inspect the exhaust system for the following:
      • exhaust leaks at flanges and gaskets
      • exhaust leaks at the NOx11 and NOx12 sensors
    • Visually inspect the intake manifold gasket for signs of leaks.
    • Inspect for radio frequency interference or electromagnetic interference.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to RD8  .
  8. RD8 CHECK THE VOLTAGE TO NOX MODULE 
    NOTE: Only diagnose the suspect NOx module indicated by the DTC.
    • For NOx11 module,
    • NOx11 Module connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) NOx11 Module Connector, Harness Side (-)
      VPWR - Pin 6 Ground
    • For NOx12 module,
    • NOx12 Module connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) NOx12 Module Connector, Harness Side (-)
      VPWR - Pin 6 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    For DTCs P220A or P220B, GO to  RD13.
    For all others, GO to RD9  .    		 REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  9. RD9 CHECK THE NOX MODULE CIRCUITS FOR AN OPEN 
    NOTE: Only diagnose the suspect NOx module indicated by the DTC.
    • Ignition OFF.
    • PCM-B connector disconnected.
    • For NOx11 module,
    • Measure the resistance between:
      (+) NOx11 Module Connector, Harness Side (-) PCM-B Connector, Harness Side
      CAN2+ - Pin 5 CAN2+ - Pin 56
      CAN2- - Pin 2 CAN2- - Pin 39
    • Measure the resistance between:
      (+) NOx11 Module Connector, Harness Side (-)
      PWRGND - Pin 1 Ground
      GND - Pin 4 Ground
    • For NOx12 module,
    • Measure the resistance between:
      (+) NOx12 Module Connector, Harness Side (-) PCM-B Connector, Harness Side
      CAN2+ - Pin 5 CAN2+ - Pin 56
      CAN2- - Pin 2 CAN2- - Pin 39
    • Measure the resistance between:
      (+) NOx12 Module Connector, Harness Side (-)
      PWRGND - Pin 1 Ground
      GND - Pin 4 Ground

    Are the resistances less than 5 ohms? 

    Yes No
    For DTCs P225A or P225B, GO to  RD12.
    For DTC P207F, INSTALL a new NOx12 sensor. REFER to the appropriate Electronic Engine Controls article.
    GO to  RD11.
    For DTCs P0139, P06EA, P06EB, P2200, P2201, P220E, P220F, P229E, P229F or P2A01, INSTALL a new NOx sensor in question. REFER to the appropriate Electronic Engine Controls article.
    GO to RD10  .
    For all others, GO to  RD13.    		 REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  10. RD10 CARRY OUT A DRIVE CYCLE 
    • Carry out a drive cycle. Refer to DRIVE CYCLES .
    • Carry out the PCM self-test.

    Are any DTCs present? 

    Yes No
    For DTCs P06EA, P06EB, P2200 or P229E, GO to  RD13.
    For all others, DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS to continue diagnosis.    		 The system is operating correctly at this time.
    Clear the PCM DTCs. REPEAT the self-test.
  11. RD11 CARRY OUT THE DIESEL PARTICULATE FILTER MANUAL REGENERATION 
    • Carry out the diesel particulate filter manual regeneration with the scan tool.
    • Drive the vehicle for greater than 16 km (10 miles) at a steady state speed.
    • Carry out the PCM self-test.

    Is DTC P207F present? 

    Yes No
    REFER to the appropriate Exhaust System article. The system is operating correctly at this time.
    Clear the PCM DTCs. REPEAT the self-test.
  12. RD12 CHECK THE NOX MODULE FOR THE LATEST CALIBRATION 
    • PCM-B connector connected.
    • For DTC P225A,
    • NOx11 Module connector connected.
    • Check the NOx11 module for the correct calibration version number.
    • For DTC P225B,
    • NOx12 Module connector connected.
    • Check the NOx12 module for the correct calibration version number.

    Does the NOx11 module or the NOx12 module calibration version number match the PCM? 

    Yes No
    The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. For DTC P225A, REPROGRAM the NOx11 module.
    Clear the PCM DTCs. REPEAT the self-test.
    For all others, REPROGRAM the NOx12 module.
    Clear the PCM DTCs. REPEAT the self-test.
  13. RD13 CHECK FOR CORRECT NOX MODULE OPERATION 
    • For DTCs P06EA, P123E, P2200, P2204, P2209, P220A, P249C, U029D or U05A1,
    • Disconnect all the NOx11 module connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the NOx11 module connectors and make sure they seat correctly.
    • For all others,
    • Disconnect all the NOx12 module connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the NOx12 module connectors and make sure they seat correctly.

    Is the concern still present? 

    Yes No
    INSTALL a new NOx module in question. REFER to the appropriate Electronic Engine Controls article.
    GO to RD14  .    		 For DTCs P123E, P123F, P2204 or P22A2, DRIVE the vehicle until the system warning message has cleared from the instrument cluster message center.
    Clear the PCM DTCs. REPEAT the self-test.
    For all others, the system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
  14. RD14 CARRY OUT THE DIESEL PARTICULATE FILTER MANUAL REGENERATION WITH THE SCAN TOOL 
    • Carry out diesel particulate filter regeneration.
    • Carry out a drive cycle. Refer to DRIVE CYCLES .

    Are DTCs P0140, P2209 or P22A7 present? 

    Yes No
    For DTC P2209, INSTALL a new NOx11 sensor. REFER to the appropriate Electronic Engine Controls article.
    Clear the PCM DTCs. REPEAT the self-test.
    For all others, INSTALL a new NOx12 sensor. REFER to the appropriate Electronic Engine Controls article.
    Clear the PCM DTCs. REPEAT the self-test.    		 The system is operating correctly at this time.
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