P0627
Fuel Pump A Control Circuit/Open
Fuel pump control
Generic OBD-II
High
What it means
P0627 means the ECM has detected an open (broken) circuit in the control side of fuel pump A — the wiring, relay, or pump driver it uses to switch the pump on. If the pump can't be commanded properly, fuel delivery suffers, which can cause hard starting, stalling, or a no-start. The fault is usually in the control wiring or relay rather than the pump itself.
High
Can I keep driving? Don't rely on the vehicle — an open fuel-pump control circuit can cut fuel delivery and cause stalling or a no-start at any moment.
Common symptoms
What you'll notice
- Check-engine light on
- Hard starting, stalling, or a no-start
- Engine sputters or cuts out under load
- Reduced power and hesitation
Common causes
Most likely first
- Open or damaged wiring/connector in the fuel-pump control circuitLikely
- Failed fuel-pump relay or driverCommon
- Failed fuel-pump control module (FPCM) where fittedCommon
- Failed fuel pumpLess often
- Poor power or ground connectionLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the fuel-pump relay, connectors, and control wiring for an open or corrosion.
- Check that the ECM commands the pump on and that power and ground reach the pump.
- Test the fuel-pump relay/driver and the pump control module if fitted.
- Replace the fuel pump only after confirming the circuit is intact. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0627?+
No, not reliably. This circuit controls the fuel pump, so the engine can stall or fail to start without warning. Have it repaired promptly.
Can I just clear P0627?+
It returns as soon as the open circuit is detected again. The wiring, relay, or pump control fault has to be fixed first.
Related codes
Often seen with P0627
Read & clear P0627 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX