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 reading the temperature of the generator. It's like when a thermometer doesn't work right, and you can't tell if it's hot or cold outside.
The vehicle's computer has detected that the signal from the generator temperature sensor is not within the expected range or performing as it should.
The P0A37 code indicates an issue with the generator temperature sensor circuit. This sensor monitors the temperature of the generator to ensure it operates within safe limits. If the sensor's signal is out of range or inconsistent, it can trigger this code.
• Check engine light is on
• Possible charging system warning light
• Reduced fuel efficiency
• Faulty generator temperature sensor
• Damaged or corroded wiring or connectors
• Faulty powertrain control module (PCM)
Generator: A device that converts mechanical energy into electrical energy.
PCM: Powertrain Control Module, the vehicle's main computer that controls engine and transmission functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors of the generator temperature sensor.
• Test the generator temperature sensor for proper operation.
• Replace the generator temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Prius
• Honda Insight
• Chevrolet Volt
• Regular maintenance checks
• Ensure clean and secure connections
• Avoid overheating the vehicle
Sensor Issue
• Have the vehicle inspected by a professional.
• Do not ignore the check engine light.
• Monitor the vehicle's performance for any changes.
Check with the manufacturer for warranty coverage on emissions-related components.
This code is often associated with hybrid vehicles where the generator plays a crucial role in the vehicle's operation.
Moderate – It should be addressed soon to prevent potential damage to the generator.
Driving with a faulty generator temperature sensor can lead to further damage or reduced vehicle performance.
• Engine running
• Vehicle at operating temperature
The generator temperature sensor is typically located near the generator or alternator in the engine compartment.
Q: Can I drive my car with a P0A37 code?
A: It's possible to drive for a short period, but it's recommended to fix the issue soon to avoid further damage.
Q: How can I reset the check engine light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are made.
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