P025AFuel Pump Module A Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- On demand-controlled fuel systems the engine module does not drive the pump itself but sends a pump control module the desired pump output on a separate control line, usually as a duty cycle; the module reports back on a monitor line or via CAN. P025A means the control line from the engine module to pump module A is open or faulty. On Ford systems the pump module itself detects the bad command signal and reports it on the monitor line (11–16 V, 2–5 s); Ford uses P025A for the shared line to modules A and B. GM's pump module compares the enable line with the request on the data bus and sets P025A after about 1 s, with the warning light in the first trip; on some Ford vehicles the code does not light it.
- What you may notice
- Check engine light (manufacturer-dependent)
- Hard or no start
- Rough idle, surging
- Lack of power from wrong fuel pressure
- Likely causes
- LikelyControl line to the pump module open or shorted, often along the frame
- LikelyConnector at the pump module corroded or wet (module often mounted on the frame)
- PossiblePump control module faulty (input)
- PossibleModule ground or supply poor
- RareEngine module output faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.