Water in Fuel Sensor Circuit Range/Performance
The ECU detects that the water-in-fuel sensor signal is implausible compared to operating conditions. The reading does not change as expected during fuel filter purge or warm-up.
Affected components
- Water in fuel sensor
- Fuel filter housing
Common causes
- High likelihood: Sensor drift or contamination
- Low likelihood: Sensor element aged beyond calibration window
- Low likelihood: Sensor mounting loose - signal damping
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.