Q: Fuel pump will not stop running when the engine is turned off

asked by on

The electric fuel pump is running continually when the motor is turned off and will not stop. In order to keep the battery from running down, I have disconnected the negative post.

My car has 51000 miles.
My car has an automatic transmission.

It sounds like you have an intermittent short in the control circuit of the fuel pump relay. It may be easier to just remove the fuel pump relay when you stop the car instead of removing the negative terminal each time, as I’m sure you’re probably doing a bit of damage to the terminal when re-tightening it each time. I would not recommend leaving it loose either, as it can affect many electrical systems in your car, as well as run the risk of damage from electrical arcing. This is a potentially dangerous situation and should be looked at very soon by a qualified mechanic such as one from YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Fuel pump will not stop running when the engine is turned off

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I put a fuel pump in and a fuel pump relay. The relay works but there is no power to the fuel pump.

Hi there. There could be an issue with the wiring to the fuel pump between the fuel pump relay and the fuel pump. Remove the wiring to the fuel pump and check the resistance from the wiring from the relay...

Q: Q: Car is stuttering while accelerating

Hesitation can be caused by a number of components even if the check engine light is not on. A bad mass airflow sensor, coolant sensor, throttle position sensor, ignition coil or module, or even a fuel delivery issue. If an...

Q: My car is overheating quickly - 2000 Lincoln LS

Hi and thanks for contacting YourMechanic. Check to see if the electric fan is coming on when at idle. If the fan is not coming on, check the fuse box for any blown fuses. If all of the fuses are...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...