Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the sensor that measures how hot or cold the alternative fuel tank is. It's not working right.
The P01AB code is triggered when the Powertrain Control Module (PCM) detects a problem with the range or performance of the alternative fuel tank temperature sensor.
The alternative fuel tank temperature sensor monitors the temperature of the fuel in the tank. This information is used by the PCM to adjust fuel delivery and ensure optimal performance. If the sensor's readings are outside the expected range, or if the sensor is not performing as expected, the PCM will set the P01AB code.
• Check Engine Light (CEL) is on
• Poor fuel economy
• Engine performance issues
• Faulty alternative fuel tank temperature sensor
• Wiring issues (e.g., open or short circuit)
• PCM software issue
PCM: Powertrain Control Module
CEL: Check Engine Light
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the alternative fuel tank temperature sensor.
• Replace the alternative fuel tank temperature sensor.
• Repair or replace damaged wiring or connectors.
• Update PCM software if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Chevrolet Volt
• Toyota Prius
• Honda Clarity
• Regular maintenance checks
• Ensure proper fuel quality
• Keep wiring and connectors clean
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Avoid driving with performance issues.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with hybrid and alternative fuel vehicles as they rely on additional sensors for fuel management.
Moderate – It should be addressed soon to avoid potential fuel efficiency and performance issues.
Ignoring this code may lead to increased emissions, which can be illegal in some areas.
• Engine running
• Vehicle at operating temperature
The alternative fuel tank temperature sensor is typically located on or near the fuel tank.
Q: Can I drive with the P01AB code?
A: You can drive short distances, but it's best to address the issue soon to avoid further problems.
Q: Is the P01AB code serious?
A: It's moderately serious as it can affect fuel efficiency and engine performance.
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