What are the 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.

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.

P0627

Fuel Pump A Control Circuit/Open

System: Computer output circuits (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P0627 means Fuel Pump A Control Circuit/Open.

Where it lives

For P0627, the pump sits on the circuit this code reports. The description of P0627 reports the pump as open.

Check these first

Open fuel pump control wiring
Blown fuel pump fuse or relay
Failed fuel pump controller
Faulty fuel pump motor
Faulty PCM fuel pump driver

What to do next

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

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Updated

Generic SAE J2012 definition. Last updated 2026-08-30.