Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
If there are any other EGR, Turbocharger, or Intake system DTCs present, repair those DTCs before proceeding.
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 it idle for up to one minute.
6. With the scan tool, read DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
FUEL RAIL PRESSURE SENSOR
1. With the scan tool, monitor the actual fuel pressure reading while the ignition is on and engine is not running.
  Is the actual fuel pressure reading above 870 psi?
  
  Yes
  - Go To 3.
  No
  - Go To 4.
VISUALLY INSPECT THE FUEL RAIL PRESSURE SENSOR
1. Visually inspect the fuel system components for signs of tampering, pay particular attention to the Fuel Pressure Sensor on the fuel rail and the Fuel Pressure Sensor wiring harness.
  Were any signs of tampering discovered?
  
  Yes
  - Replace the Fuel Pressure Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE INJECTOR RETURN FLOW
1. Perform the INJECTOR RETURN FLOW TEST. Refer to Diagnosis and Testing , 6.7L .
  Does the injector drainage meet the test specification?
  
  Yes
  - Replace the Fuel Pressure Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Repair cause of high Fuel Injector leakage.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .