Fuel Tank Temp Sensor Circuit Malfunction
The P1463 code indicates a fault in the fuel tank temperature sensor circuit. This sensor, monitored by the powertrain control module (PCM), measures fuel temperature inside the tank. The PCM uses this data to calculate fuel density and adjust the EVAP canister purge flow for proper evaporative emission control. When the sensor signal is out of the expected voltage range or the circuit is interrupted, the PCM sets this manufacturer-specific trouble code.
01. Most Common Causes
- Faulty or out-of-calibration fuel tank temperature sensor
- Sensor circuit wiring shorted to ground or voltage
- Corroded, bent, or poorly connected electrical connector
- Open circuit in the sensor signal or reference wire
- Internal PCM failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Possible failed emissions test
- No noticeable drivability issues in most cases
03. Step-by-Step Diagnosis
Scan for additional codes and freeze frame data
Visually inspect the sensor connector and wiring for damage or corrosion
Measure sensor resistance and compare to manufacturer specifications
Check for reference voltage (typically 5V) and ground at the sensor connector
If wiring and sensor check out, test PCM output or perform a PCM reset
1. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive with this code. The vehicle may still operate normally, but the EVAP system may not function correctly, potentially causing increased emissions or a failed emissions test.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the sensor needs replacement ($50-$150 for the part) or if wiring repairs are needed. Diagnostic fees may add $75-$150.