Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, erase DTCs in the PCM.
3. Start the engine.
4. Allow the engine to reach normal operating temperature.
5. Test drive the vehicle and monitor the scan tool.
6. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK THE (K902) O2 RETURN UPSTREAM CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the Oxygen Sensor harness connector.
3. Disconnect the PCM C1 harness connector.
4. Measure the resistance of the (K902) O2 Return Upstream circuit between the Oxygen Sensor harness connector and the PCM C1 harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (K902) O2 Return Upstream circuit for an open/high resistance.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 3
OXYGEN SENSOR
1. Turn the ignition off.
2. Reconnect the PCM C1 harness connector.
3. Replace the Oxygen Sensor in accordance with the service information.
4. Turn the ignition on.
5. With the scan tool, erase DTCs in the PCM.
6. Start the engine.
7. Allow the engine to reach normal operating temperature.
8. Test drive the vehicle and monitor the scan tool.
9. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 4
  No
  - Test Complete.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
POWERTRAIN CONTROL MODULE
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen Sensor and the Powertrain Control Module.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. 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 Powertrain Control Module (PCM) in accordance with the service information. Refer to REMOVAL .
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .