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 there's a problem with the sensor that checks the temperature of the fuel vaporizer. Sometimes it works, and sometimes it doesn't, like a light bulb that flickers.
The P2A59 code indicates an issue with the circuit of the temperature sensor that monitors the outlet of the alternative fuel vaporizer. The signal is intermittent or erratic, meaning it is not consistent.
The Alternative Fuel Vaporizer B Outlet Temperature Sensor is responsible for measuring the temperature of the fuel vaporizer's outlet. When the Engine Control Module (ECM) detects an irregular signal from this sensor, it triggers the P2A59 code. This can be due to wiring issues, sensor malfunction, or other electrical problems.
• Check Engine Light illuminated
• Inconsistent engine performance
• Poor fuel efficiency
• Faulty temperature sensor
• Wiring issues or poor connections
• ECM software glitch
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Inspect the wiring and connectors for damage or corrosion.
• Test the temperature sensor for proper operation.
• Check the ECM for any software updates or faults.
• Replace the faulty temperature sensor.
• Repair or replace damaged wiring or connectors.
• Update or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks
• Ensure good quality fuel is used
• Inspect wiring and connectors periodically
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle checked by a professional mechanic.
• Avoid driving long distances until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code is relatively uncommon and typically appears in vehicles using alternative fuel systems.
Moderate – It should be addressed soon to prevent further issues.
Driving with a malfunctioning emissions system may not comply with local emissions laws.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The temperature sensor is typically located near the fuel vaporizer outlet, which may be in the engine bay or near the fuel system.
Q: Can I drive with a P2A59 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to further engine performance issues.
Q: How can I reset the Check Engine Light?
A: You can reset it using an OBD-II scanner, but it's important to fix the underlying issue first.
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