P064AFuel Pump Control Module A
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Demand-controlled fuel systems drive the pump through a separate pump control module; the engine module sets the target and reads its status back. P064A means this module reports an internal fault. Ford petrol engines encode the status as a duty cycle on a monitor line – 30 % (±4 %) means internal driver fault, 20 % invalid data (P025B), no signal U0109 – and set the code after 2–5 s; Ford's 2023 diesel checks the period of the monitor signal (0–1.2 s, 0.5 s). GM's pump module sets P064A when its output stage exceeds 150 °C (3 of 15 samples), with the lamp after two trips; Ford petrol stores it without the lamp. Pump output may be reduced or switched off, so low fuel pressure, stalling or a no-start can follow. A stiff, worn pump drawing high current can overheat the module.
- What you may notice
- Check engine light (GM) or stored code only (Ford petrol)
- Hard start, stumbling or lack of power from low fuel pressure
- Stalling or no start if the pump is switched off
- Fuel pressure codes as well (e.g. P0087)
- Likely causes
- LikelyPump control module faulty internally (output stage, electronics)
- PossibleOutput stage overheating from a stiff or worn pump or poor module cooling
- PossibleSupply or ground fault or corrosion at the module (often on frame or tank)
- RareDisturbed monitor line, so a wrong duty cycle is read
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €150 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.