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.

ACTIVE DTC
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. Start the engine and let idle for up to five minutes.
6. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (K734) O2 SENSOR 1/2 POSITIVE CURRENT CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the O2 Sensor 1/2 harness connector.
3. Disconnect the Smart O2 Sensor Module harness connector.
4. Measure the resistance of the (K734) O2 Sensor 1/2 Positive Current Control circuit between the O2 Sensor 1/2 harness connector and the Smart O2 Sensor Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 3.
  No
  - Repair the (K734) O2 Sensor 1/2 Positive Current Control circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
OXYGEN SENSOR SOOTED
1. Remove the O2 Sensor 1/2.
2. Carefully clean the soot from the O2 Sensor.
  NOTE:
  Do not tap or bang the sensor to remove loose debris. This will damage the sensor.
3. Reinstall the O2 Sensor 1/2.
4. With the scan tool, erase DTCs.
5. Turn the ignition off for 75 seconds.
6. Start the engine and let idle for up to five minutes.
7. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 4.
  No
  - Repair complete.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
SMART O2 SENSOR MODULE
1. Remove the O2 Sensor 1/2 and O2 Sensor 1/1.
2. Install the O2 Sensor 1/2 in the O2 Sensor 1/1 position.
3. Install the O2 Sensor 1/1 in the O2 Sensor 1/2 position.
4. With the scan tool, erase DTCs.
5. Turn the ignition off for 75 seconds.
6. Start the engine and let idle for five minutes.
7. With the scan tool, read DTCs.
  Did the DTC change to P2237?
  
  Yes
  - Reinstall O2 Sensor 1/1 back to it's original position and replace the O2 Sensor 1/2 in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Replace the Smart O2 Sensor Module in accordance with the service information. Return the O2 Sensors back to their original positions.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .