Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

OTHER DTCs
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Are any other DTCs present?
  
  Yes
  - Repair all other DTCs first.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 2.
MAF SENSOR
1. With the scan tool, read The Mass Air Flow sensor.
  Does the Mass Air Flow sensor read 0 +/- 2 lb/min?
  
  Yes
  - Go To 3.
  No
  - Replace the MAF Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .

CHECK FOR AN OPEN CIRCUIT IN THE UPSTREAM O2 SENSOR

Fig 1: O2 Sensor 1/1 & O2 Sensor Module Connector Pin ID

Courtesy of CHRYSLER LLC

Turn the ignition off.
Disconnect the Upstream Oxygen Sensor harness connector.
Disconnect the Smart O2 Sensor Module from the Aftertreatment Wiring Harness.
NOTE:
Check connectors - Clean/repair as necessary.

Measure the resistance of all circuits between the O2 Sensor 1/1 harness connector and the Smart O2 Sensor Module harness connector.

Upstream O2 sensor cavity	O2 Sensor Module cavity
1	7
2	14
3	16
4	1
5	15
6	6

Is the resistance less than 5.0 Ohms on all circuits?

Yes

Go To 4.

Replace the Aftertreatment Wiring Harness in accordance with the service information.
Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .

CHECK FOR AN OPEN CIRCUIT IN THE DOWNSTREAM O2 SENSOR

Fig 2: O2 Sensor 1/2 & O2 Sensor Module Connector Pin ID

Courtesy of CHRYSLER LLC

Disconnect the Downstream Oxygen sensor harness connector.
Disconnect the Smart O2 Sensor Module from the Aftertreatment Wiring Harness.
NOTE:
Check connectors - Clean/repair as necessary.

Measure the resistance between all circuits in the O2 Sensor 1/2 harness connector and the Smart O2 Sensor Module harness connector.

Downstream O2 sensor cavity	O2 Sensor Module cavity
1	5
2	12
3	8
4	2
5	13
6	4

Is the resistance less than 5.0 Ohms on all circuits?

Yes

Go To 5.

Replace the Aftertreatment Wiring Harness in accordance with the service information.
Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .

OXYGEN SENSORS
1. Remove the Oxygen sensors and inspect for signs of soot.
  Is there soot on the oxygen sensors?
  
  Yes
  - Using pressurized air, blow out the soot deposits by applying the pressurized air directly into the center hole of the sensors. Reinstall the sensors. Go To 6.
  No
  - Reinstall the sensors. Go To 6.
EGR SYSTEM LEAK
1. Look for visible signs (soot streaks) of an external EGR leak. Check the EGR Valve and EGR Cooler for signs of a leak.
  Are there any EGR system leaks?
  
  Yes
  - Repair the leak.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 7.
CHECK THE INTAKE AIR SYSTEM
1. Perform the INTAKE AIR SYSTEM PRESSURE TEST. Refer to Diagnosis and Testing , 6.7L .
  Are there any leaks in the system?
  
  Yes
  - Repair the leak.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 8.
CHECK FOR EXHAUST LEAKS
1. Perform the CHECKING THE EXHAUST SYSTEM FOR LEAKS diagnostic procedure. Refer to Diagnosis and Testing , 6.7L .
  Are there any leaks in the system?
  
  Yes
  - Repair the Exhaust system leaks.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Perform the AFTERTREATMENT INSPECTION GUIDELINE procedure. Refer to Diagnosis and Testing , 6.7L .