P0232Fuel Pump Secondary Circuit High
- 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. P0232 means there is voltage in the pump power circuit although the pump should be off – a welded relay contact or a power wire shorted to another supply. GM pump modules check this after switch-off or in the off phase of the PWM cycle; above about 4 V the code sets once per trip, with the warning light after two trips. Ford's relay systems see it through the pump monitor wire. Driving is usually unaffected, but the pump may keep running with the ignition off and drain the battery – and an emergency shutdown would not work.
- What you may notice
- Fuel pump keeps running after switch-off
- Battery drained overnight
- Check engine light on (GM after two trips)
- Often nothing noticeable while driving
- Likely causes
- LikelyRelay contact welded or sticking
- PossiblePump power wire shorted to another supply
- PossiblePump control module output stage shorted
- RareMoisture or corrosion in the connector causing leakage current
- 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 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.