P2268: Water in Fuel Sensor A Circuit Intermittent

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.

Low severity. Can I keep driving?You can normally keep driving. If it affects the fuel level, do not trust the gauge and refuel earlier than usual.

Symptoms

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

Check the connector and wiring
Gently move the wiring with the engine running and watch whether the reading changes.
Use live data to compare the reading with actual conditions
Measure power, ground, and signal
Replace the sensor if the circuit is good

Good to know

Repair difficulty: easy

What each character of P2268 means

P: Powertrain: engine and transmission
2: Generic code: same on every make
2: Fuel injection
68: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2268?

You can normally keep driving. If it affects the fuel level, do not trust the gauge and refuel earlier than usual.

What causes code P2268?

The most common causes are: 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.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.