P0537

A/C Evaporator Temperature Sensor Circuit Low

Moderate severity

The evaporator temperature sensor signal voltage is below the lower diagnostic threshold. Indicates a short to ground or sensor fault.

Common causes

Sensor internally shorted
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $70-330
Signal wire shorted to ground
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $70-330
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does P0537 mean?

P0537 means "A/C Evaporator Temperature Sensor Circuit Low". It is a generic OBD-II code that points to a fault in the vehicle speed, idle control, auxiliary inputs.

What are the most common causes of P0537?

sensor internally shorted; signal wire shorted to ground; connector pins corroded - high contact resistance — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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