P0939

Hydraulic Oil Temperature Sensor Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect operation of the automatic transmission
Increased noise during power steering operation
Check Engine Light Illuminates
Reduced hydraulic system efficiency

Causes

Hydraulic oil temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in wiring connectors
Problems with the engine control unit
Contaminated or low hydraulic oil level

How to Fix

Check the level and condition of the hydraulic oil
Inspect the sensor circuit for damage
Check sensor connectors and contacts
Test hydraulic oil temperature sensor
Replace sensor if necessary

Related codes