For Shop Owners

P1234 - Fuel Pump Driver Module Disabled Or Off Line

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Inertia fuel shutoff (IFS) switch needs to be reset
  • Faulty Fuel Pump Driver Module (FPDM)
  • Fuel Pump Driver Module (FPDM) harness is open or shorted
  • Fuel Pump Driver Module (FPDM) circuit poor electrical connection
  • Faulty Inertia Fuel Shutoff (IFS) switch
  • Faulty Powertrain Control Module (PCM)
What does this mean?

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1234 Description

The Powertrain Control Module (PCM) monitors the Fuel Pump Monitor (FPM) circuit from the Fuel Pump Driver Module (FPDM). With the key on, the FPDM continuously sends a duty cycle signal to the PCM through the FPM circuit. The test fails if the PCM stops receiving the duty cycle signal.
OBDII Code P1234 - Fuel Pump Driver Module Disabled Or Off Line - itimaster.ru

P1234 Information for specific makes

P1234 BMW Fuel Pump Relay Activation
P1234 BUICK Injector Circuit Cylinder 5 Intermittent
P1234 CADILLAC Injector Circuit Cylinder 5 Intermittent
P1234 CHEVROLET Injector Circuit Cylinder 5 Intermittent
P1234 CHRYSLER Pedal Position Sensor 2 CKT Plausibility
P1234 DODGE Pedal Position Sensor 2 CKT Plausibility
P1234 FORD Fuel Pump Driver Module Disabled Or Off Line
P1234 GMC Injector Circuit Cylinder 5 Intermittent
P1234 JEEP Pedal Position Sensor 2 CKT Plausibility
P1234 LINCOLN Fuel Pump Driver Module Disabled Or Off Line
P1234 MAZDA Fuel Pump Driver Module Disabled Or Off Line
P1234 MERCURY Fuel Pump Driver Module Disabled Or Off Line
P1234 MINI Fuel Pump Relay Activation
P1234 MITSUBISHI Sub Throttle Position Sensor Plausibility

Need more help?

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P1234 Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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Ford F150 1998 Ford F150
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