What does code P2266 mean?

Q: What does code P2266 mean?

Water in Fuel Sensor Circuit Low. P2266 indicates the powertrain control module (PCM) has detected a low-voltage condition on the water-in-fuel sensor circuit, meaning the sensor signal is below the expected range. This typically occurs when the sensor detects excessive water in the fuel filter/water separator or when the circuit itself has a fault such as a short to ground or an open. The PCM sets this code to alert the driver that the water-in-fuel system is not functioning correctly.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2266

P2266Water in Fuel Sensor Circuit Low

P2266 indicates the powertrain control module (PCM) has detected a low-voltage condition on the water-in-fuel sensor circuit, meaning the sensor signal is below the expected range. This typically occurs when the sensor detects excessive water in the fuel filter/water separator or when the circuit itself has a fault such as a short to ground or an open. The PCM sets this code to alert the driver that the water-in-fuel system is not functioning correctly.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.