P2264: Water in fuel sensor circuit fault
The ECU sees an electrical fault on the sensor that warns of water in the diesel filter. Usually its connector, the wiring or the sensor.
| Code | P2264 |
|---|---|
| System | Engine and transmission |
| Group | P22xx, NOx sensors, oxygen sensors and emissions |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P2264 means
Diesel engines have a sensor in the fuel filter that detects collected water, so it can warn you before the water reaches the injection system. This code does not mean there is water, but that the sensor circuit has a fault, so the car cannot warn you if water gets in.
Most common causes
- Loose, dirty or corroded connector on the filter sensor
- Sensor badly fitted or left off after a filter change
- Damaged wiring near the filter
- Faulty water sensor
- Non genuine fuel filter without the right mounting for the sensor
Symptoms
- Engine warning light on
- Sometimes a water in fuel warning with no reason
- Engine usually runs as normal
Can you drive with P2264?
With care You can drive, but the car will no longer warn you if water gets into the diesel. Get it checked soon and drain the filter if in doubt.
Open the bonnetthe in-depth explanation
How to check it
If the code appeared right after a fuel filter change, first check that the sensor and its connector were refitted properly. Draining water from the filter through its bottom drain screw is a good way to rule out real water.
How to read and clear P2264 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P2264 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P2260 The secondary air injection system control B gives a higher signal than normal
- P2261 The turbocharger or supercharger bypass valve has a fault
- P2262 No turbo boost pressure is detected
- P2263 Turbocharger or supercharger boost system performance
- P2265 The fuel and water separator sensor works out of range or abnormally
- P2269 Water in fuel detected
- P226B The boost pressure of the turbocharger or supercharger is too high
- P226C The turbocharger boost control A responds slowly
- P2200 NOx sensor circuit fault (bank 1)
- P2201 NOx sensor circuit range or performance problem (bank 1)
- P2227 Barometric pressure sensor A range or performance problem
- P2228 Barometric pressure sensor A circuit low
What does code P2264 mean?
Diesel engines have a sensor in the fuel filter that detects collected water, so it can warn you before the water reaches the injection system. This code does not mean there is water, but that the sensor circuit has a fault, so the car cannot warn you if water gets in.
Can you drive with P2264?
You can drive, but the car will no longer warn you if water gets into the diesel. Get it checked soon and drain the filter if in doubt.
How do you clear P2264?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P2264 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
