PACCAR MX (2004 Emissions) Fault Code: P00BA Common Rail Fuel Pressure – Data Valid but Too Low, Moderately Severe

PACCAR MX (2004 Emissions) Fault Code: P00BA Common Rail Fuel Pressure – Data Valid but Too Low, Moderately Severe

SET CONDITIONS:
The PCI ECU (D420) detects that the actual rail pressure is less than 100 bar.

DIAGNOSTIC CONDITION:
This diagnostic runs when the engine is running.

CORRESPONDING OBD READINESS MONITOR:
None

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 diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. A common rail pump unit failure if DTCs P0094 and/or P228D are also present.
2. An external or internal leakage on the high-pressure fuel system components.

ADDITIONAL INFORMATION:
1. The rail pressure is closed-loop controlled. A comparison is made between the requested and actual rail pressure measured by the common rail pressure sensor.

2. The rail pressure is measured in the common rail by the common rail pressure sensor (F854).