P0627
Fuel Pump "A" Control Circuit Open
The ECU detected an open circuit in the fuel pump A control output. With no pump operation the engine cannot run; this code is often paired with no-start and no fuel pressure.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Common causes
Ordered by how often each turns out to be the cause.
- Fuel pump relay failedCommon
- Wiring openPossible
- Pin pushed back out of connector bodyLess likely
Parts involved
- Fuel Pump
- Fuel Pump Relay
- Pump Wiring
P0627 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.