PACCAR MX (2004 Emissions) Fault Code: P1194 Fuel Filter - Very Clogged

PACCAR MX (2004 Emissions) Fault Code: P1194 Fuel Filter - Very Clogged

SET CONDITIONS:
The PCI ECU (D420) detects that:
1. Fuel temperature is more than 95?C [203?F] and
2. Fuel pressure is too low

DIAGNOSTIC CONDITION:
This diagnostic runs continuously 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:
Very clogged fuel filter

ADDITIONAL INFORMATION:
1. The low-pressure fuel pressure is measured by the fuel pressure sensor (F801).
2. The low-pressure fuel temperature is measured by the fuel temperature sensor (F803).
3. Engine torque is reduced.

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