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 reset?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (K79) O2 SENSOR 1/1 HEATER RETURN CIRCUIT FOR A SHORT TO VOLTAGE

Fig 1: O2 Sensor Module Connector Pin ID
Courtesy of CHRYSLER LLC
1. Turn the engine off.
2. Disconnect the Smart O2 Sensor Module harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (K79) O2 Sensor 1/1 Heater Return circuit at the Smart O2 Sensor Module harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage on the (K79) O2 Sensor 1/1 Heater Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CHECK THE OXYGEN SENSOR

Fig 2: O2 Sensor 1/2 Terminal ID (Component ID)
Courtesy of CHRYSLER LLC
1. Measure the resistance of the O2 Sensor 1/1 Heater circuit through the O2 Sensor.
  Is the resistance 3.2 +/- 0.8 Ohms at ambient temperature?
  
  Yes
  - Go To 4.
  No
  - Replace the O2 Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
OXYGEN SENSOR AND O2 SENSOR CONTROL MODULE
1. Remove the O2 Sensor 1/1 and O2 Sensor 1/2. Clean the soot from the sensors.
2. Install the O2 Sensor 1/1 in the O2 Sensor 1/2 position.
3. Install the O2 Sensor 1/2 in the O2 Sensor 1/1 position.
4. With the scan tool, erase DTCs.
5. Turn the ignition off for 75 seconds.
6. Start the engine and let idle for two minutes.
7. With the scan tool, read DTCs.
  Did the DTC change to P0038?
  
  Yes
  - Reinstall the O2 Sensor 1/2 back to it's original position and replace the O2 Sensor 1/1.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Replace the O2 Sensor Control 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 .