P2266Water in Fuel Sensor A Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- P2266 is set when the signal line of water-in-fuel sensor A stays below its valid range, typical of a grounded signal wire or of a conductive path that should not be there. Ford documents the code on 2017 and 2018 Super Duty trucks with the 6.7L diesel built up to 15 March 2018: bulletin 18-2133 links P2266, P2269 and P1140 with a lit water-in-fuel lamp to water entering connector C3080 at the sensor, which sits between tank and frame rail. The procedure checks the sensor across pins 1 and 2 for 795 to 815 kOhm, replaces it if out of range, then dries and wraps the connector. As water itself conducts, a wet plug can fake both a low circuit and a water alarm. P2267 is the high side, P2264 the general circuit code.
- What you may notice
- Water-in-fuel lamp on although no water is in the separator
- Often stored together with P2269
- Likely causes
- LikelyWater intrusion into the sensor connector bridging signal and ground
- PossibleSensor with internal resistance outside specification
- PossibleSignal wire chafed against the frame and shorted to ground
- 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.