Hydraulic Oil Temperature Sensor Range/Performance

Where it lives

For P0938, the part to look at first is the sensor named here.

Check these first

• A hydraulic oil temperature sensor drifting out of range
• A temperature sensor connector with corrosion
• A restricted cooler skewing oil temperature
• A failed hydraulic oil temperature sensor

What to do next

1. Read hydraulic oil temperature on a scan tool
2. Compare the reading against ambient with the engine cold
3. Check the fluid cooler for restriction
4. Inspect the temperature sensor connector and wiring
5. Replace the sensor if the reading drifts
6. Clear the code and retest

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