Fuel Temperature Sensor B Circuit High Input
Fuel temperature sensor B signal exceeds maximum. Shorted to voltage, open ground or open sensor. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Affected components
- Fuel temperature sensor b
- Sensor wiring
Common causes
- High likelihood: Signal wire shorted to voltage
- Medium likelihood: Sensor open-circuit
- Low likelihood: Connector pins corroded - high contact resistance
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.