P0230Fuel Pump Primary Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- The fuel pump circuit has two sides: the primary circuit is the engine module's output to the fuel pump relay coil (or to a pump control module), the secondary circuit is the power circuit from relay contact or module to the pump itself. P0230 concerns the primary side. GM's output driver compares the commanded with the actual state of the relay control circuit and sets the code at 8 of 10 mismatches, after two trips; Ford checks for open or short circuits for 2–5 s. With a failed relay control the pump stays off and the engine will not start or dies; a short to voltage keeps the pump running and drains the battery. On Ford systems with a pump control module the code means its power relay circuit; on the Subaru-based Saab 9-2X it is the pump module's collective fault report.
- What you may notice
- Engine cranks but does not start
- Engine stalls while driving
- Check engine light on
- No pump prime noise at ignition on; with a short to voltage the pump runs on and drains the battery
- Likely causes
- LikelyFuel pump relay faulty (coil open or shorted)
- PossibleControl wire from module to relay open or shorted to ground or voltage
- PossibleRelay supply, ground or fuse missing
- PossibleWith a pump control module: its supply, ground or the module itself
- RareEngine module driver faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €15 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.