Diagnostic Test
WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- READ AND RECORD DTCS - CHECK FOR THE DTC NOTE:
If there are any other EGR, Turbocharger, or Intake system DTCs present, repair those DTCs before proceeding.
- Turn the ignition on.
- With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
- For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
- Start the engine and let it idle for up to one minute.
- With the scan tool, read DTCs.
Is the DTC active or pending?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
- FUEL RAIL PRESSURE SENSOR
- VISUALLY INSPECT THE FUEL RAIL PRESSURE SENSOR
- 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. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 4
- 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.
- CHECK THE INJECTOR RETURN FLOW
- Refer to INJECTOR RETURN FLOW TEST
and perform the INJECTOR RETURN FLOW TEST.
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. Refer to POWERTRAIN VERIFICATION TEST .
No
- Repair cause of high Fuel Injector leakage.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Refer to INJECTOR RETURN FLOW TEST
and perform the INJECTOR RETURN FLOW TEST.