Skip the auto shop - Our mechanics make house calls

P0232 OBD-II Trouble Code: Fuel Pump Secondary Circuit High

Check Engine Light

P0232 code definition

Fuel Pump Secondary Circuit High

What the P0232 code means

P0232 is a generic OBD-II code that is triggered when the engine control module (ECM) detects that the secondary circuit to the fuel pump has a high voltage when the fuel pump relay is turned off.

What causes the P0232 code?

  • The engine control module (ECM) monitored the secondary fuel pump circuit voltage from the fuel pump relay when the relay is turned off and there was voltage getting to the fuel pump to keep running the pump even after the key is turned off

  • The fuel pump relay is stuck on, keeping power supplied to the fuel pump even after the ignition has been turned off

  • The fuel pump secondary power circuit has a short to battery voltage

What are the symptoms of the P0232 code?

  • The Check Engine Light will be illuminated and the P0232 code is set in ECM memory

  • The fuel pump will continue to run even after the key is turned off, draining the battery

  • The vehicle will fail to start after the battery has been drained, unless jump started

How does a mechanic diagnose the P0232 code?

  • Scans codes and documents the freeze frame data in order to verify the problem

  • Clears the DTC codes to verify whether the concern comes back

  • Tests to see if voltage is getting to the fuel pump secondary circuit through the IFS and relay after the engine has been turned off

  • Lightly taps the relay, if power is still being supplied through the relay, to see if power turns off, which would indicate that the relay is sticking and needs replaced

  • Check for an internal short in the ECM if it continues to supply power to the relay after the ignition has been turned off

Common mistakes when diagnosing the P0232 code

Follow these simple guidelines to prevent misdiagnosis:

  • Look for a stuck fuel pump relay by lightly tapping it to see if it is sticking, while monitoring to see if the voltage turns off to the secondary circuit

  • Check the electrical connections at the fuel pump relay for a shorted connector wiring

How serious is the P0232 code?

  • If the relay is stuck in the On position, the fuel pump secondary circuit can continue to run the fuel pump until the battery dies

  • The continued short will not only kill the battery, but will put excessive strain on the fuel pump and wiring to the pump, causing additional failures of components

What repairs can fix the P0232 code?

  • Replacing the fuel pump relay if it is making a connection on the secondary side of the relay after the ignition is turned off

  • Repairing the fuel pump relay connector if shorted to power on the secondary side

  • Replacing the battery after the relay is replaced, if it will not recharge

Additional comments for consideration regarding the P0232 code

Code P0232 is triggered when voltage in the fuel pump secondary circuit is shorted to vehicle power through the relay. The ECM monitors this voltage to see if it stays on after the key is turned off. The most common failure is a relay stuck to the On position internally.

Need help with a P0232 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

Symptoms of a Bad or Failing Flexible Clutch Hose
Common signs include difficulty shifting, low clutch fluid, and feeling no resistance at the clutch pedal.
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...


Related questions

Q: Shifting issues, skipping gears and jerking while letting off the gas

The transmission case servo pin bore gets worn out. To repair this is to drill the hole out, and install a sleeve bushing to repair the transmission housing. The transmission will need to be removed, and taken apart to do...

Q: A.I.R. pump is missing in my car

Hello. The A.I.R. system is an emissions system that is designed to inject air into the exhaust manifold to help with the combustion of any unburned fuel before it reaches the catalytic converter, resulting in cleaner emissions. In order to...

Q: Stalling misfiring CEL

Hello, thanks for writing in about your 2003 Jeep TJ. Yes a clogged catalytic converter can cause the O2 sensors to go bad prematurely. I suggest replacing the clogged catalytic converter before installing the new O2 sensors. I can't say...