BMW DTC P0938 – Hydraulic Oil Temperature Sensor Range/Performance
DTC P0938 meaning on BMW
The Diagnostic Trouble Code (DTC) P0938 for BMW refers to the Hydraulic Oil Temperature Sensor Range/Performance issue. This code indicates that the powertrain control module (PCM) has detected a problem with the hydraulic oil temperature sensor’s readings falling outside the expected range or performance parameters.
BMW DTC P0938 symptoms
Symptoms of the DTC P0938 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Inaccurate or erratic readings on the hydraulic oil temperature gauge
- Transmission shifting issues
- Reduced fuel efficiency
BMW DTC P0938 causes
Common causes of the DTC P0938 on a BMW include:
- Faulty hydraulic oil temperature sensor
- Wiring or connector issues in the sensor circuit
- Low hydraulic oil level
- Hydraulic system malfunction
BMW DTC P0938 seriousness
The DTC P0938 should not be ignored as it can lead to potential transmission problems and affect the overall performance of the vehicle. It is recommended to address this issue promptly to prevent further damage and ensure the vehicle operates optimally.
How to diagnose DTC P0938 on BMW
To diagnose the DTC P0938 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the PCM
- Inspect the hydraulic oil temperature sensor and its wiring for any visible damage or corrosion
- Check the hydraulic oil level and quality
- Perform a thorough inspection of the hydraulic system for any leaks or malfunctions
How to fix DTC P0938 on BMW
To fix the DTC P0938 on a BMW, the following steps may be taken:
- Replace the faulty hydraulic oil temperature sensor
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Ensure the hydraulic oil level is at the recommended level
- Address any issues found in the hydraulic system
How to erase DTC P0938 on BMW
To erase the DTC P0938 on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made, the mechanic can reset the codes, and the Check Engine Light should turn off if the issue has been successfully resolved.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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