Water in Fuel Sensor A Circuit Low
The water-in-fuel sensor at the diesel fuel filter reads below lower plausibility — short to ground. The sensor warns the driver to drain the filter when condensate accumulates.
Affected components
- Water in fuel sensor
- Fuel filter
Common causes
- High likelihood: Short to ground
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Harness chafing through insulation
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
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.