BMW DTC P0198 – Engine Oil Temperature Sensor ‘A’ Circuit High
DTC P0198 meaning on BMW
The Diagnostic Trouble Code (DTC) P0198 for BMW refers to the Engine Oil Temperature Sensor ‘A’ Circuit High. This code indicates that the engine oil temperature sensor is reporting a higher than expected voltage signal to the engine control module (ECM).
BMW DTC P0198 symptoms
Symptoms of DTC P0198 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Inaccurate or erratic engine oil temperature readings on the gauge
- Engine running hotter than normal
- Reduced engine performance or efficiency
BMW DTC P0198 causes
Common causes of DTC P0198 on a BMW include:
- Faulty engine oil temperature sensor
- Wiring or connector issues in the sensor circuit
- ECM software or hardware problems
BMW DTC P0198 seriousness
While DTC P0198 may not cause immediate drivability issues, it is important to address this code promptly to prevent potential engine damage due to incorrect temperature readings.
How to diagnose DTC P0198 on BMW
To diagnose DTC P0198 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the engine oil temperature sensor and its wiring for any visible damage
- Test the sensor’s resistance and voltage output using a multimeter
- Check for any loose connections or corrosion in the sensor circuit
- Verify the ECM software for any updates or reprogramming
How to fix DTC P0198 on BMW
To fix DTC P0198 on a BMW, you can try the following solutions:
- Replace the faulty engine oil temperature sensor
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Clear the fault code and reset the ECM after making repairs
How to erase DTC P0198 on BMW
To erase DTC P0198 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. After fixing the underlying issue causing the code, clearing the code will reset the Check Engine Light and ensure the system is functioning properly.