PACCAR MX (2004 Emissions) Fault Code: P1087 Fuel Pressure – Data Valid but Too Low, Moderately Severe
PACCAR MX (2004 Emissions) Fault Code: P1087 Fuel Pressure – Data Valid but Too Low, Moderately Severe
SET CONDITIONS:
The PCI ECU (D420) detects that the fuel pressure is too low for more than 50 seconds.
DIAGNOSTIC CONDITION:
This diagnostic runs when the engine has been running for more than 200 seconds.
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:
Faulty fuel pressure control valve Restriction in the fuel supply or low performance of the fuel lift pump.
ADDITIONAL INFORMATION:
The low pressure fuel pressure is measured by the fuel pressure sensor (F801).
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