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P1237 - Fuel Pump Secondary Circuit Fault

Possible causes
- 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 fuel pump

What does this mean? What does this mean?
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1237 Description

Fuel Pump Driver Modules (FPDM) controls the voltage to the Fuel Pump in order to maintain proper fuel pressure over the full operating range of the engine. The P1237 code indicates the FPDM detected a fuel pump secondary circuit concern. The FPDM sends a message to the Powertrain Control Module (PCM) through the Fuel Pump Monitor (FPM) circuit indicating this concern was detected. The PCM sets the DTC when the message is received.

P1237 Information for specific makes
P1237 AUDI Injector Circuit Open Cylinder 1
P1237 BUICK Injector Circuit Cylinder 6 Intermittent
P1237 CADILLAC Injector Circuit Cylinder 6 Intermittent
P1237 CHEVROLET Injector Circuit Cylinder 6 Intermittent
P1237 FORD Fuel Pump Secondary Circuit Fault
P1237 GMC Injector Circuit Cylinder 6 Intermittent
P1237 ISUZU High Fuel Pressure Regulator Circuit Shorted To Ground
P1237 LINCOLN Fuel Pump Secondary Circuit Fault
P1237 MAZDA Fuel Pump Driver Module Disabled or Off Line
P1237 MERCURY Fuel Pump Secondary Circuit Fault
P1237 MITSUBISHI Accelerator Pedal Position Sensor Plausibility
P1237 SAAB Intake Manifold Air Control Solenoid Outer Flap Open Circuit/Short To Positive
P1237 VOLKSWAGEN Injector Circuit Open Cylinder 1
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