P2264 code meaning
Water in Fuel Sensor A Circuit
What P2264 means
P2264 is the general circuit code for water-in-fuel sensor A, the probe in the diesel filter or separator that detects water by its conductivity. GM's 2018 diesel tables explain a neat self-test: after the ignition has been off for more than about 8 h, a healthy sensor briefly signals water during the first 0.3 to 1.8 s after power-up. If that pulse is missing in 10 of 14 samples of 100 ms, P2264 sets as a Type C code that turns on the Service Vehicle Soon lamp rather than the MIL; versions exist for sensors wired to the ECM and to the fuel tank zone module. Ford's 2014 PCM table also lists the code. With the circuit faulty, the warning for real water no longer works, so the separator should be drained by hand until it is fixed. P2265 to P2268 split the fault further.
P2264 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2264
- Service lamp or message on, engine runs normally
- No warning if water actually collects in the separator
Common causes of P2264
- Most likelyWater-in-fuel sensor that no longer performs its power-up self-test
- Most likelyCorroded or loose connector at the filter housing, exposed to road spray
- PossibleOpen or damaged wire between sensor and ECM or tank zone module
- Less likelyIncompatible sensor fitted during a filter change
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Water in fuel sensorFuel filter housing
What each part of P2264 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 2 | Area: fuel and air metering (injector circuit). |
| 64 | The exact fault in that area. |
What to do next
- Note P2264 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2264
What does P2264 mean?
P2264 means "Water in Fuel Sensor A Circuit". P2264 is the general circuit code for water-in-fuel sensor A, the probe in the diesel filter or separator that detects water by its conductivity. It is a generic code, so it means the same on every make.
Is it safe to drive with P2264?
P2264 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2264 fail an emissions test?
P2264 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2264 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2264 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.