P1235 - FAULT CODE - OBD2

POST UPDATED IN January, 2023

P1235 Code failures by brands

P1235 FORD, LINCOLN, MERCURY: FUEL PUMP CONTROL OUT OF RANGE

Description of DTC code P1235

The Fuel Pump Drive Module (FPDM) sometimes is called the Fuel Solenoid Controller or FSD. It controls the voltage supplied to the fuel pump. By regulating this voltage, the pump drive module maintains fuel pressure at its optimum level and fuel delivery throughout its operating range.

The FPDM controls the high-pressure fuel pumps of modern engines through fuel injection. Although initially this controller was installed inside the vehicle, nowadays, manufacturers include it on top of the pump due to design flaws.

The OBDII diagnostic code P1235 is a specific code used for Ford and other vehicles to state the Fuel Pump Drive Module has detected an invalid or missing signal being sent in the fuel pump circuit.

Symptoms of fault code P1235

  • Check Engine light ON.
  • Motor starting difficulties.
  • Poor acceleration.

Causes of OBD2 P1235

The P1235 OBD2 fault code P1235 is stored for one of the following reasons:

  • The Fuel Pump Drive Module wires or connectors may be damaged.
  • The FPDM may be in poor condition.
  • The Powertrain Control Module may be faulty.

Possible solutions of the DTC code P1235

To solve the DTC P1235 OBDII code, try this:

  • Consult the TSBs.
  • Check the condition of the wiring and connections related to the Fuel Pump Drive Module. If there is damage due to corrosion, burns, or wear, carry out the respective repairs.
  • Measure the FPDM voltages and check if they are within those indicated on the vehicle's data source. If you discover inconsistencies, check the continuity of the circuit. Make any necessary corrections.
  • If there is no damage to the electrical components, there may be a control module in poor condition. In this case, go to an advanced service center.

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