P0938

Hydraulic Oil Temperature Sensor Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Check Engine Light Is On
Reduced engine performance
Unusual transmission noises
Hydraulic oil overheating

Causes

Faulty hydraulic oil temperature sensor
Open or short circuit in the sensor circuit
Poor contact or corroded connectors
Low or dirty hydraulic oil level
Transmission control module (TCM) problems

How to Fix

Check the level and condition of the hydraulic oil
Scan the system for other fault codes
Check the sensor circuit for breaks and short circuits
Replace hydraulic oil temperature sensor if necessary
Clean or replace sensor connectors if corrosion is present

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