P0627 Fuel Pump A Control Circuit/Open
What does P0627 mean?
P0627 — Fuel Pump A Control Circuit/Open. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects fuel pump a control circuit/open. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0627
- Open fuel pump control wiring
- Blown fuel pump fuse or relay
- Failed fuel pump controller
- Faulty fuel pump motor
- Faulty PCM fuel pump driver
How to fix P0627
- Verify the pump primes for a few seconds at key-on
- Check the fuel pump fuse, relay, and controller
- Measure pump voltage and current at the harness
- Test the pump directly with power and ground
- Replace the pump, relay, or controller and reprogram if needed