Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
A faulty EGR Outlet Temperature Sensor can cause this DTC to set. Repair any EGR Outlet Temperature Sensor DTCs before proceeding.

NOTE:
If DTC P245C or P245D are present, perform those test procedures before proceeding with this diagnostic tree.
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Allow vehicle to cool until coolant has reached ambient air temperature.
5. Turn ignition on and start the engine.
6. Allow engine to idle until coolant has reached 140 degrees F.
7. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (K688) EGR BYPASS MOTOR (+) CIRCUIT
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Measure the resistance of the (K688) EGR Cooler Bypass Valve Motor (+) circuit between the EGR Cooler Bypass Valve harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (K688) EGR Cooler Bypass Valve Motor (+) circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K689) EGR BYPASS MOTOR (-) CIRCUIT
1. Measure the resistance of the (K689) EGR Cooler Bypass Valve Motor (-) circuit between the EGR Cooler Bypass Valve harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (K689) EGR Cooler Bypass Valve Motor (-) circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
EGR COOLER BYPASS VALVE
1. Replace the EGR Cooler Bypass Valve.
2. Turn the ignition on.
3. With the scan tool, erase DTCs.
4. Start the engine and test drive the vehicle.
5. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the service information. Refer to MODULE, POWERTRAIN CONTROL, 6.7L DIESEL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Repair complete.
  - Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L. Refer to DIESEL AFTERTREATMENT VALIDATION- 6.7L .