Diagnostic Test
WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
- ACTIVE DTC NOTE:
If there are any DTCs related to Fuel Quantity, Fuel Rail Pressure, EGR, Crankshaft Position, or Camshaft Position, perform the Diagnostics for those DTCs before continuing with this one.
- Ignition on, engine not running.
- With the scan tool check for active DTCs.
Is this DTC active?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
- CHECKING FOR AN ENGINE KNOCK
- Start the engine and let idle for one minute then operate engine under conditions in which complaint(s) occur.
- Listen for an engine knock.
Is there a knock present?
Yes
- Go To 3
No
- Replace the Fuel Injector. If this DTC was accompanied by a Crankcase Pressure Sensor DTC, damage to the cylinder may have occurred.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
- CHECKING FOR A LEAKING FUEL INJECTOR
- Continue to run the engine at idle. Using the scan tool, perform the Injector Kill Test for the cylinder in question.
Does the knock go away?
Yes
- Replace the Fuel Injector. If this DTC was accompanied by a Crankcase Pressure Sensor DTC, damage to the cylinder may have occurred.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
No
- Diagnose the engine for a mechanical failure.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
- Continue to run the engine at idle. Using the scan tool, perform the Injector Kill Test for the cylinder in question.