Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
Ensure that the correct application NOx Sensors are being used (and properly connected in their correct locations) before continuing with this Diagnostic tree.

NOTE:
If DTCs P220A, P220B, U029D, or U029E are present, perform the Diagnostics for those DTCs before continuing with this one.
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Turn the ignition on, run the engine to operating temperature
6. Test drive the vehicle under normal operating conditions.
  NOTE:
  During cold ambient temperatures, it may be necessary to test drive the vehicle for an extended period to properly cycle the fail conditions for this DTC.
  
  NOTE:
  During extremely cold ambient temperatures, it may be necessary to perform an overnight soak of the vehicle at shop temperatures before beginning this Test Step.
7. With the scan tool, read DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2
  No
  - Perform to the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK THE EXHAUST SYSTEM FOR LEAKS
1. Visually inspect the entire exhaust system for signs of a leak.
  Were any exhaust leaks found?
  
  Yes
  - Perform the appropriate repair.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 3
NOX SENSOR 1/1
NOTE:
The NOx Sensor consists of a Module and a Probe (with a harness in between) which cannot be serviced separately. They are replaced as one unit.

CAUTION:
Do not attempt to disconnect the NOx harness connector between the NOx Sensor Probe and the NOx Sensor Module. This connector is permanently attached to the NOx Sensor Module. Any attempt to remove this connector will permanently damage the NOx Sensor.
1. Using the wiring diagram/schematic as a guide, inspect the (vehicle harness) wiring and connectors between the NOx Sensor 1/1 (Module) and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace the NOx Sensor 1/1 in accordance with the service information.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .