Water in Fuel Sensor Circuit Intermittent
P2268 indicates an intermittent fault in the water-in-fuel sensor circuit, meaning the sensor is not communicating reliably with the engine control module. This code sets when the ECU detects erratic or missing signals from the water detection sensor, which monitors for fuel contamination that could damage the fuel system and engine.
What You Might Notice
- Engine stalling or rough idling
- Severe misfiring during acceleration
- Difficulty starting the engine
- Reduced fuel economy
- Check engine light illuminated
- Water in fuel warning light active
Most Common Causes
- 1
Defective water-in-fuel sensor
The sensor itself has failed or is producing intermittent signals due to internal electrical breakdown or contamination on the sensing element.
- 2
Corroded or damaged wiring and connectors
Moisture or corrosion on the sensor connector pins or wiring harness causes intermittent signal loss, especially in wet conditions.
- 3
Contaminated or degraded fuel filter
A severely clogged or failing fuel filter prevents proper fuel flow to the sensor or allows water accumulation that interferes with sensor function.
- 4
Blown fuse or loose electrical connections
A faulty fuse or fusible link, or loose connections in the sensor circuit, causes intermittent power supply to the sensor.
How to Diagnose It
- 1
Check Defective water-in-fuel sensor — The sensor itself has failed or is producing intermittent signals due to internal electrical breakdown or contamination on the sensing element.
- 2
Check Corroded or damaged wiring and connectors — Moisture or corrosion on the sensor connector pins or wiring harness causes intermittent signal loss, especially in wet conditions.
- 3
Check Contaminated or degraded fuel filter — A severely clogged or failing fuel filter prevents proper fuel flow to the sensor or allows water accumulation that interferes with sensor function.
- 4
Check Blown fuse or loose electrical connections — A faulty fuse or fusible link, or loose connections in the sensor circuit, causes intermittent power supply to the sensor.
How to Fix It
- 1
Inspect and clean sensor connector
Remove the water-in-fuel sensor connector and inspect for corrosion, moisture, or loose pins. Clean with electrical contact cleaner and ensure a tight connection.
- 2
Replace water-in-fuel sensor
If the connector is clean but the code persists, the sensor has likely failed internally and must be replaced with a new OEM or quality aftermarket sensor.
- 3
Replace fuel filter and drain tank
If water or severe contamination is visible in the fuel system, replace the fuel filter and consider draining the fuel tank to remove water and sediment that may trigger the sensor repeatedly.
- 4
Check and replace fuse and wiring harness
Verify the sensor circuit fuse is not blown and inspect the wiring harness for damage, corrosion, or loose connections along its entire length. Replace any damaged components.
Need a deeper diagnosis?
Search for related repair guides or browse by system.