P0231
Fuel Pump Secondary Circuit Low
P0231 is an OBD-II diagnostic trouble code meaning: Fuel Pump Secondary Circuit Low. Common causes: fuel pump motor wear, faulty fuel pump relay. Estimated repair cost: $56–278.
Symptoms
- Difficulty starting the engine or no starting
- Dips and power losses under load
- Stopping the engine while moving
- Low fuel pressure
- Check Engine Light Illuminates
Causes
- Fuel pump motor wear
- Faulty fuel pump relay
- Poor contact in the pump connector
- Fuel filter clogged (increased resistance)
- Damage to the pump wiring harness
- Low battery or power problems
How to Fix
- Read error codes and check data in case of failure
- Check the supply voltage at the fuel pump connector
- Check the fuel pump relay (replace with a known working one)
- Measure the fuel pressure with a pressure gauge
- Replace the fuel filter (with mileage over 30,000 km)
- If the malfunction is confirmed, replace the fuel pump
Related codes
Error P0231 by Vehicle Brand
FAQ
What does the P0231 code mean?
P0231 is an OBD-II diagnostic trouble code that indicates: Fuel Pump Secondary Circuit Low
What causes a P0231 error code?
The most common causes of P0231 include: Fuel pump motor wear; Faulty fuel pump relay; Poor contact in the pump connector; Fuel filter clogged (increased resistance).
How do I fix a P0231 diagnostic trouble code?
To fix P0231: Read error codes and check data in case of failure. Check the supply voltage at the fuel pump connector. Check the fuel pump relay (replace with a known working one). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0231?
Yes, but get it checked soon
How much does it cost to fix P0231?
The estimated repair cost for P0231 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat