P0627
Fuel Pump "A" Control Circuit/Open
High· Fix promptlyIntermediatePowertrainGeneric, all makes
What it means
The fuel pump control circuit is open. On many modern cars a separate fuel pump control module drives the pump, and this code points to that circuit.
Is it safe to drive?
Risky. The engine may not start or may stall.
Symptoms
- Engine cranks but does not start
- Stalling
- Long cranking
Probable causes
Most likely first
- 1Failed fuel pump control module (common on some Ford and GM models)
- 2Corroded connector at the pump or module
- 3Open wiring
- 4Failed fuel pump
How to diagnose it
Work through these in order before buying parts
- 1Record the code and its freeze frame data (speed, load, temperature when it set), then clear it and see if it comes back.
- 2Inspect the fuel pump module and its connectors for corrosion.
- 3Check power and ground at the pump.
- 4Check for technical service bulletins (TSBs) or software updates for your make and model; some codes have known factory fixes.
Common fixes
- Replace the fuel pump control module
- Repair corroded connectors
- Replace the fuel pump
This information is general guidance for all makes. Exact causes, specifications and procedures vary by vehicle, so confirm with your service manual or a qualified mechanic before replacing parts.