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P0231

Fuel Pump Secondary Circuit — Signal Too Low

High — fix right awayDo not drive

Severity: Fix right away. Driving risks expensive damage or a breakdown.

What P0231 means

The feedback signal from the fuel pump circuit is lower than expected, which usually means the pump is not getting full power.

Common causes

How to fix it

Test the fuel pump relay and wiring, then test the pump's power supply and the pump itself.

Can I drive with P0231?

The engine may starve for fuel under load or stall. Get it checked before driving far.

Related codes

Questions, answered

Is it safe to drive with code P0231?

Avoid driving until it is checked — towing is the safer choice. The engine may starve for fuel under load or stall. Get it checked before driving far.

What causes code P0231?

The most common causes are: Failing fuel pump relay; Corroded wiring or connector; Failing fuel pump; Blown fuse. A scan tool and a visual check of the parts above is where a technician starts.

How do I fix code P0231?

Test the fuel pump relay and wiring, then test the pump's power supply and the pump itself.

Not repair advice. This page gives general information about code P0231 only. Cars differ by make, model and year — confirm the fault with a scan tool and have the repair done by a qualified technician.

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