P0627

Symptoms

• The Check Engine light comes on
• The engine does not start or stalls after starting
• The characteristic hum of the fuel pump is not heard when the ignition is turned on
• Fuel pressure is missing or below normal
• The engine stalls while driving for no apparent reason

Causes

• Blown fuel pump fuse
• Faulty fuel pump relay
• Broken wire in the pump relay control circuit
• Fuel pump control module (FPM) malfunction
• Internal ECU fault (pump control output)

How to Fix

1. Check the fuel pump fuse (usually in the relay box)
2. Check the fuel pump relay - replace it with a good one
3. Listen to see if the pump hum is heard when the ignition is turned on.
4. Measure the supply voltage at the fuel pump connector
5. Check the wiring from the ECU to the pump relay
6. Check the fuel pressure with a pressure gauge

Related codes

Error P0627 by Vehicle Brand