P2265Water in Fuel Sensor A Circuit Range/Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- P2265 means the signal from water-in-fuel sensor A is electrically present but does not behave plausibly, for example a self-test response that comes at the wrong time or a value that sits between the expected dry and wet states. No manufacturer documents P2265 publicly. A comparable check appears in GM's 2018 diesel tables under P2264: after a long ignition-off period the sensor has to signal water for a short moment right after power-up, and a missing response is judged as a fault. The probes measure conductivity between two electrodes in the water sump of the filter, so a film of dirt, biodiesel residue or a partly corroded probe can push the reading into an implausible zone. The code usually lights only a service or water warning; draining and cleaning come before replacing parts.
- What you may notice
- Water warning or service lamp that comes and goes
- Water warning stays on even after the filter has been drained
- Likely causes
- LikelySludge, emulsion or deposits coating the sensor electrodes
- PossibleSensor electronics drifting so the output lies between dry and wet
- PossibleCorroded terminals adding resistance to the signal circuit
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.