EVAP Fuel Vapor Temperature Sensor Circuit High Voltage
The EVAP fuel-vapor temperature sensor signal sits above the upper plausibility limit — open signal line, broken sensor, or short to B+.
Affected components
- Evap fuel vapor temp sensor
Common causes
- High likelihood: Open signal line
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Supply wire pinched against B+ source
Possible symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.