Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble getting a steady reading from the sensor that checks the pressure in the alternative fuel tank. It's like when a video game controller has a loose wire and the character keeps moving on its own.
The P01A2 code is triggered when the vehicle's engine control module (ECM) detects an intermittent or erratic signal from the pressure sensor in the alternative fuel tank.
The alternative fuel tank pressure sensor is responsible for monitoring the pressure within the tank. This information is crucial for the ECM to manage fuel delivery and ensure safe operation. An erratic signal can indicate issues with the sensor, wiring, or connectors, leading to potential fuel management problems.
• Check Engine Light on
• Erratic fuel gauge readings
• Possible fuel odor
• Faulty alternative fuel tank pressure sensor
• Damaged or corroded wiring/connectors
• ECM software glitch
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the pressure sensor for proper operation.
• Replace the faulty pressure sensor.
• Repair or replace damaged wiring/connectors.
• Update the ECM software if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Toyota Prius
• Honda Civic Hybrid
• Chevrolet Volt
• Regularly inspect fuel system components.
• Keep wiring and connectors clean and dry.
• Ensure ECM software is up to date.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid DIY repairs if you're not experienced with vehicle electronics.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has become more common with the increased use of alternative fuel vehicles.
Moderate – While not immediately dangerous, it should be addressed to prevent fuel system issues.
Driving with a malfunctioning fuel sensor can lead to inaccurate fuel readings, which may cause unexpected vehicle behavior.
• Engine running
• Vehicle at operating temperature
The alternative fuel tank pressure sensor is typically located on or near the alternative fuel tank.
Q: Can I drive with a P01A2 code?
A: It's possible to drive with this code, but it's not recommended as it can lead to inaccurate fuel readings and potential safety issues.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can reset the light using an OBD-II scanner or by disconnecting the battery for a few minutes, but ensure the issue is resolved first.
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