For Shop Owners

P1237 MERCURY - Fuel Pump Secondary Circuit Fault

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

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?

When is the code detected?

Fuel pump driver module has detected a fault in the fuel pump secondary circuit

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine will not start

P1237 MERCURY 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.
OBDII Code P1237 Mercury - Fuel Pump Secondary Circuit Fault -

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P1237 MERCURY 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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Posted and Edit by 07-20-2016

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