P2264Water in Fuel Sensor A Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- P2264 is the general circuit code for water-in-fuel sensor A, the probe in the diesel filter or separator that detects water by its conductivity. GM's 2018 diesel tables explain a neat self-test: after the ignition has been off for more than about 8 h, a healthy sensor briefly signals water during the first 0.3 to 1.8 s after power-up. If that pulse is missing in 10 of 14 samples of 100 ms, P2264 sets as a Type C code that turns on the Service Vehicle Soon lamp rather than the MIL; versions exist for sensors wired to the ECM and to the fuel tank zone module. Ford's 2014 PCM table also lists the code. With the circuit faulty, the warning for real water no longer works, so the separator should be drained by hand until it is fixed. P2265 to P2268 split the fault further.
- What you may notice
- Service lamp or message on, engine runs normally
- No warning if water actually collects in the separator
- Likely causes
- LikelyWater-in-fuel sensor that no longer performs its power-up self-test
- LikelyCorroded or loose connector at the filter housing, exposed to road spray
- PossibleOpen or damaged wire between sensor and ECM or tank zone module
- RareIncompatible sensor fitted during a filter change
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.