Water in Fuel Sensor Circuit Range/Performance
What does P2264 mean?
The P2264 code means the vehicle's onboard diagnostic system has detected: Water in Fuel Sensor Circuit Range/Performance. This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Water in fuel warning light
- Rough idle or stalling
- Hard starting especially in cold weather
- Reduced engine power
Probable Causes (Ranked by Likelihood)
- Actual water contamination in the fuel tank or fuel filter Very High
- Faulty water in fuel sensor High
- Corroded sensor connector Moderate
- Wiring issue in the sensor circuit Moderate
- Contaminated fuel filter housing Low
Step-by-Step Diagnostic Procedure
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Drain the fuel filter water separator and check for water presence
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Inspect the water in fuel sensor and connector for damage or corrosion
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Test the sensor operation by applying and removing water from the sensor tip
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Check the wiring from the sensor to the ECM for continuity
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Replace the sensor if it does not respond correctly to water presence
Frequently Asked Questions
What does the water in fuel sensor do?
The water in fuel sensor detects water contamination in the fuel system, typically located in the fuel filter housing. Water in diesel fuel can cause serious damage to fuel injectors and the injection pump.
How does water get into the fuel?
Water enters fuel through condensation in the fuel tank, contaminated fuel from the gas station, a damaged fuel cap seal, or a cracked fuel tank.
Should I drain the water separator first?
Yes, always drain the fuel filter water separator first. If the water warning goes away after draining, the sensor was detecting actual water. If the code persists after draining, the sensor may be faulty.