Fault codeP0230

SEVERE

Fuel Pump Primary Circuit Malfunction

What this code means

Fuel Pump Primary Circuit Malfunction.

P0230 is a generic code: it means the same thing on every make. P0230 belongs to family P02xx — Injector circuit. Its page explains how to read a code and groups all its codes by part.

Type of fault

The control unit has detected an electrical anomaly on this circuit without saying exactly which. Diagnosis starts with a visual check of the wiring and connector, then measuring the component — resistance, supply, ground — with a multimeter.

Fuel pump

The fuel pump, usually inside the tank, sends fuel to the engine. The control unit switches it on through a relay or a control module, sometimes at several speeds, and may check its circuit.

What you notice

Hard starting, the engine cutting out under load, loss of power at high speed, or no start at all if the pump stops.

How to check it

Check the pump's fuse and relay first, then its connector, often on top of the tank under the rear seat or the boot floor. With ignition on, you should hear the pump run for a second or two. Klaro's fuel pressure reading, when the car reports it, shows whether pressure holds under load.

Watch it live in Klaro

With an OBD2 adapter plugged in, these live readings show the part at work, when your car reports them:

Fuel pressure
Fuel rail pressure (absolute)
Fuel rail absolute pressure

What to do

Have it checked promptly. An injection, fuel-supply or boost fault can cost power, cause misfires and eventually damage the engine or the catalytic converter. If the light is flashing or the engine is overheating, stop driving.

Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back. Clearing a fault code yourself →

How to read this code

PPowertrain
0standardised code
2Injector circuit
30P0230