Damaged, corroded or loose wiring or connector in the fuel pump control module circuit (open circuit); Blown fuse or faulty relay supplying the fuel pump module; Faulty fuel pump driver or control module; Failed fuel pump or pump motor with an internal open circuit; Poor power or earth supply to the fuel pump control module, including low battery voltage; Engine control unit fault or outdated software affecting pump control (model dependent).

P025A

Fuel Pump Module A Control Circuit/Open.

Generic
Powertrain
Generic code
High severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
2: AreaFuel and air metering (injector circuit)
5A: FaultThe specific fault in that area

What it means

P025A is the generic code for a fault in the control circuit of fuel pump module A, specifically an open circuit. The engine control unit commands the fuel pump control module and monitors the circuit. It sets the code when the feedback or circuit state does not match the command, which points to a break or very high resistance in that circuit.

Symptoms

Engine cranks but will not start
Engine stalls or cuts out while driving
Loss of power or hesitation under load
Rough running or misfire from fuel starvation
Check engine light on, possibly with other fuel pressure codes
Intermittent starting problems that come and go

Possible causes

Damaged, corroded or loose wiring or connector in the fuel pump control module circuit (open circuit)likely
Blown fuse or faulty relay supplying the fuel pump modulelikely
Faulty fuel pump driver or control modulepossible
Failed fuel pump or pump motor with an internal open circuitpossible
Poor power or earth supply to the fuel pump control module, including low battery voltagepossible
Engine control unit fault or outdated software affecting pump control (model dependent)rare

How to diagnose

Read all stored codes and freeze frame data, noting engine speed, load and battery voltage when the code set, and check for related fuel pressure or communication codes
Check the battery condition and charging voltage, as low voltage can upset module control
Inspect the fuses and relay for the fuel pump and its control module, referring to the wiring diagram for your model
Visually inspect the wiring and connectors at the fuel pump, the control module and any joints, looking for corrosion, water ingress, chafing or pushed-out pins
Check power and earth supplies at the fuel pump control module with the ignition on, using a multimeter
With the circuit isolated, test continuity and resistance of the control wire between the engine control unit, the module and the pump against the wiring diagram
Command the pump on with a scan tool if supported and check for pump operation, then measure fuel pressure against specification
Check the manufacturer's service information for known software updates or module faults for the specific model and engine

How to fix

Repair or replace damaged wiring and clean or replace faulty connectors
Replace the blown fuse after finding why it failed, or replace a faulty relay
Replace the fuel pump or fuel pump assembly if it has an internal open circuit
Replace the fuel pump control module if power, earth and wiring are proven good and it fails to respond
Restore good power and earth connections, and fix any battery or charging fault
Update the engine control unit software only if the manufacturer lists it as a fix for this fault

Can I keep driving?

High severity

Avoid driving the car. An open fuel pump control circuit can cause the engine to stall without warning, which is unsafe in traffic, so have it repaired before further use.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.