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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 53 (2.0L - DTCS P253F To U0109) >> DTC Troubleshooting >> P253F Engine Oil Deteriorated >> Diagnostic Test

Diagnostic Test

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CHANGE THE ENGINE OIL AND FILTER AND VERIFY CONDITION IS REPAIRED 

  1. Change the engine oil and filter and use the recommended oil for this engine to avoid engine damage due to severe spark knock. Refer to CAPACITIES AND RECOMMENDED FLUIDS, SPECIFICATIONS .
  2. With the scan tool, erase the DTC.
  3. Test drive the vehicle to operating temperature.
  4. With the scan tool, read DTCs.

    Did the DTC return?

    Yes 

    • Diagnose the engine for any conditions that can cause an extreme spark knock condition.

    No 

    • Changing the oil and filter repaired the vehicle.