P0A37

Generator Temperature Sensor Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–50 (est.)

Symptoms

Check Engine Light Is On
Unstable generator operation
Increased temperature in the engine compartment
Reduced battery charging efficiency
False generator temperature readings

Causes

Faulty generator temperature sensor
Open or short circuit in the sensor circuit
Corroded or loose connector pins
Problems with the generator
ECU software error

How to Fix

Check the resistance of the temperature sensor
Inspect the wiring harness for damage or chafing.
Clean sensor connector contacts
Check generator operation
Reset the error and test the system after repair

Related codes

P0A38 P0A36 P0620