Subaru Error Code P1231: How to Fix It

Q: What causes Subaru error code P1231?

P1231 is typically caused by a faulty fuel pump control module, damaged wiring harness, bad fuel pump relay, blown fuses, or a failing fuel pump assembly that's drawing incorrect current.

Q: Can I drive with P1231 error code?

You should not drive with P1231 as it indicates fuel delivery problems that can cause engine stalling or failure to start. This creates safety risks and potential engine damage from fuel starvation.

Q: How much does it cost to fix P1231?

Repair costs vary from $50-100 for fuses/relays, $200-400 for control module replacement, $300-600 for fuel pump assembly, plus $100-200 in labor depending on your location and vehicle model.

Q: Is P1231 the same on all Subaru models?

Yes, P1231 refers to fuel pump control module low input across all Subaru models, though the specific location of components and repair procedures may vary between different model years and engine types.

Abstract

Subaru error code P1231 indicates a fuel pump control module low input, meaning the engine control unit is not receiving the proper voltage signal from the fuel pump control circuit. This can cause poor fuel delivery, engine stalling, or failure to start, requiring immediate attention to prevent engine damage.