Error code
OBD2 P0938
OBD2P0938
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Hydraulic Oil Temperature Sensor Range/Performance.
Severity
moderateCan be driven, but transmission performance may suffer and fluid overheating could occur.
Summary
P0938 indicates an issue with the hydraulic oil temperature sensor, which monitors the temperature of the transmission fluid. This code is related to the transmission control module (TCM).
Common Causes
- Wiring issues affecting the hydraulic oil temperature sensor
- Faulty hydraulic oil temperature sensor
- ECM/PCM/TCM malfunction
Fixes
- Replace the faulty hydraulic oil temperature sensor.
FAQ
What does P0938 mean?
P0938 indicates a problem with the hydraulic oil temperature sensor, which is crucial for monitoring transmission fluid temperature.
How do I fix P0938?
The most common solution is to replace the faulty hydraulic oil temperature sensor. However, diagnosing and repairing wiring issues or a malfunctioning TCM may also be necessary.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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