P01AC
Alternative Fuel Tank Temperature Sensor Circuit Low
P01AC is an OBD-II diagnostic trouble code meaning: Alternative Fuel Tank Temperature Sensor Circuit Low. Common causes: sensor wire short circuit to ground, temperature sensor circuit open. Estimated repair cost: $22–89.
Symptoms
- Inability to start on alternative fuel
- Automatic switching to main fuel
- Check Engine Light Illuminates
- Increased fuel consumption
- Unstable cold start
Causes
- Sensor wire short circuit to ground
- Temperature sensor circuit open
- Faulty tank temperature sensor
- Oxidation or damage to the sensor connector
- ECU malfunction (rare)
How to Fix
- Read error codes and record data in case of failure
- Check the voltage at the sensor connector (normal 4.5–5 V)
- Check the wiring harness for breaks and short circuits
- Measure the sensor resistance and compare with the norm
- Clean the sensor connector from oxidation
- If necessary, replace the alternative fuel tank temperature sensor
Related codes
Error P01AC by Vehicle Brand
FAQ
What does the P01AC code mean?
P01AC is an OBD-II diagnostic trouble code that indicates: Alternative Fuel Tank Temperature Sensor Circuit Low
What causes a P01AC error code?
The most common causes of P01AC include: Sensor wire short circuit to ground; Temperature sensor circuit open; Faulty tank temperature sensor; Oxidation or damage to the sensor connector.
How do I fix a P01AC diagnostic trouble code?
To fix P01AC: Read error codes and record data in case of failure. Check the voltage at the sensor connector (normal 4.5–5 V). Check the wiring harness for breaks and short circuits. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P01AC?
Yes, but get it checked soon
How much does it cost to fix P01AC?
The estimated repair cost for P01AC is $22–89. Actual cost depends on your vehicle, location, and labor rates.
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