PACCAR MX (2004 Emissions) Fault Code: P0305 Cylinder 5 - Contribution Too Low or Misfire

PACCAR MX (2004 Emissions) Fault Code: P0305 Cylinder 5 - Contribution Too Low or Misfire

SET CONDITIONS:
The PCI ECU (D420) detects that cylinder 5 is misfiring or the combustion contribution is lower relative to the other cylinders.

DIAGNOSTIC CONDITION:
This diagnostic runs when the engine is running at a steady speed and load, and the vehicle speed is steady.

CORRESPONDING OBD READINESS MONITOR:
Misfire monitor

RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the following conditions:
- Corresponding readiness monitor displays 'Ready'
- Diagnostic conditions are met
- Set conditions are met
3. Did the DTC come back?
- No, repair successful
- Yes, repair unsuccessful

POSSIBLE CAUSES:
1. Faulty cylinder 5 injector (not fueling or under-fueling)
2. Loose cylinder 5 injector
3. Faulty MX Engine Brake cylinder 5
4. Symptom: Slightly reduced power:
- Incorrect valve clearance
- Large imbalance in the drive shaft
5. Symptom: Engine block vibration at high load, damaged flywheel
6. Mechanical defect (for example damaged cam follower or broken valve)

ADDITIONAL INFORMATION:
The PCI ECU can detect and identify the cylinder contribution of every cylinder based on analysis of the rotational speed of the crankshaft using a:
1. Cylinder-to-cylinder engine speed comparison and
2. A cylinder-to-cylinder rotational crankshaft acceleration comparison

If you want to know other articles similar to PACCAR MX (2004 Emissions) Fault Code: P0305 Cylinder 5 - Contribution Too Low or Misfire you can visit the category DTC TRUCKS.