P0230
Fuel Pump Primary Circuit Malfunction
An electrical fault in the fuel pump primary control circuit (relay or driver). The ECU detects an open, short, or out-of-range condition on the relay/driver output.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Common causes
Ordered by how often each turns out to be the cause.
- Fuel pump relay failedCommon
- Wiring or connector faultPossible
Parts involved
- Fuel Pump Relay
- Fuel Pump
- Fuel Pump Wiring
P0230 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.