Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is saying that it can't find enough power going to the fuel pump, which is like the heart that sends fuel to your engine.
The P0231 code is triggered when the power going to the fuel pump is lower than expected. This can mean there's a problem with the wiring or the pump itself.
The P0231 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the secondary circuit of the fuel pump. This could be due to issues such as poor electrical connections, a faulty fuel pump relay, or a failing fuel pump.
• Engine may not start
• Engine stalls
• Poor engine performance
• Faulty fuel pump relay
• Damaged wiring or connectors in the fuel pump circuit
• Defective fuel pump
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
Relay: An electrical switch that opens and closes under control of another electrical circuit.
• Check the fuel pump relay and replace if necessary.
• Inspect the wiring and connectors for damage or corrosion.
• Test the fuel pump for proper operation.
• Replace the fuel pump relay if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the fuel pump if it is not functioning correctly.
• Multimeter
• Relay tester
• Basic hand tools
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain fuel system components.
• Ensure electrical connections are clean and secure.
• Replace fuel filters as recommended by the manufacturer.
Electrical Circuit Issue
• Do not ignore this code as it can lead to engine stalling.
• Have a professional diagnose and repair the issue to avoid further damage.
Check with your vehicle's manufacturer for warranty coverage on fuel system components.
The P0231 code has been a common issue in vehicles with aging fuel systems, often due to wear and tear or corrosion in electrical components.
Moderate – This issue can lead to engine stalling, so it should be addressed promptly.
Driving with a malfunctioning fuel pump circuit can lead to safety hazards, such as engine stalling in traffic.
• Engine running
• Fuel pump operational
The fuel pump is typically located inside the fuel tank, while the relay and wiring are found in the engine bay or near the fuse box.
Q: What happens if I ignore the P0231 code?
A: Ignoring this code can lead to engine stalling and potentially leave you stranded.
Q: Can I drive with a P0231 code?
A: It is not recommended to drive with this code as it can cause your engine to stall unexpectedly.
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