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 has detected a problem with the sensor that measures the temperature of the air conditioner evaporator. It's saying the sensor is reading too low, like it's colder than it should be.
The A/C evaporator temperature sensor monitors the temperature of the air conditioning evaporator to ensure proper cooling. A low circuit signal indicates an unexpected low temperature reading.
The P0537 code is triggered when the Powertrain Control Module (PCM) detects a voltage signal from the A/C evaporator temperature sensor that is lower than the expected range. This sensor helps control the A/C system by providing temperature data, ensuring the system doesn't freeze up or become inefficient.
• Air conditioning not cooling properly
• A/C system might shut off unexpectedly
• Check Engine Light illuminated
• Faulty A/C evaporator temperature sensor
• Wiring issues such as shorts or open circuits
• Poor electrical connections in the sensor circuit
PCM: Powertrain Control Module
A/C: Air Conditioning
HVAC: Heating, Ventilation, and Air Conditioning
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the A/C evaporator temperature sensor for proper operation.
• Replace the A/C evaporator temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Clear the code and test the system to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect A/C system components.
• Ensure electrical connections are clean and secure.
• Perform routine maintenance on the A/C system.
Sensor Issue
• Have a professional diagnose the issue if you're not comfortable with car repairs.
• Avoid using the A/C until the problem is fixed to prevent further damage.
Check with your vehicle manufacturer; some components may be covered under warranty.
This code has been commonly reported in vehicles with aging A/C systems or those that have experienced electrical issues.
Moderate – While it may not affect the engine's performance, it can lead to discomfort and further A/C system issues if not addressed.
Driving with a malfunctioning A/C system is not illegal but can be uncomfortable and may lead to further system damage.
• Vehicle engine running
• A/C system turned on
The A/C evaporator temperature sensor is typically located near the evaporator core, inside the HVAC housing under the dashboard.
Q: Can I drive with a P0537 code?
A: Yes, but your A/C may not work properly, which can be uncomfortable in hot weather.
Q: How do I know if the sensor is faulty?
A: A professional can test the sensor's resistance and voltage output to determine if it's working correctly.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.