Powertrain, generic (extended)

P2268 Water in Fuel Sensor A Circuit Intermittent

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2268 is reserved for a water-in-fuel sensor A circuit whose signal drops out or jumps for short moments instead of staying at a fault level. No manufacturer documents P2268 publicly. The neighbouring codes show where such faults arise on real trucks: Ford traced P2266 on 6.7L Super Duty models to water entering the sensor connector, and Stellantis linked P2267 on Cummins Ram trucks to residue on the probes after draining. Both effects can come and go with temperature, vibration or fuel sloshing in the filter, which is the typical picture of an intermittent circuit. The sensor itself is a simple pair of electrodes, so the search starts at connector, terminals and harness clips. P2266 and P2267 are the steady low and high faults.

Likely causes

Loose or corroded connector at the filter housing losing contact under vibration
Wire chafing intermittently near the frame or filter bracket
Moisture in the plug that changes with temperature and spray

Symptoms

  • Water warning flickers or appears briefly while driving
  • Code stored as history with no fault present at the workshop

Repair estimate

DifficultyEasyDIY possible
Parts and labour€0–150
Time0.3–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

water in fuel sensor

Related codes

P2264P2266P2267P2269

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.