Test Procedure
- AR1 PRELIMINARY DIAGNOSIS FOR DTC P0300
- Retrieve and record all DTCs.
- Record the freeze frame data.
- Clear all DTCs.
- Carry out the continuous self-test.
Are any DTCs present?
Yes No For DTC P0300, GO to AR2.
For all other DTCs, REFER to DIAGNOSTIC TROUBLE CODE (DTC) DESCRIPTIONS .The misfire is intermittent and is currently not active. REFER to SYMPTOM CHARTS - 6.0L DIESEL if a driveability concern exists. - AR2 DIAGNOSTIC TROUBLE CODE (DTC) P0300
- Possible causes:
- fuel concern
- oil aeration
- high pressure oil pump malfunction
- fuel injector(s)
- mechanical engine failure
- electrical failure
- Carry out a visual inspection. Check for loose connections, and damaged or corroded pins. Wiggle the harness, attempting to recreate the fault.
Are any wiring or terminal concerns present?
Yes No REPAIR as necessary. CLEAR the DTCs. CARRY OUT the OBD drive cycle. REFER to DIAGNOSTIC METHODS - EXCURSION (6.0L DIESEL) . REFER to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL Performance Diagnostics Chart. CLEAR the DTCs. REPEAT the self-test.
- Possible causes: