BMW DTC P1129 – Engine Oil Level Sensor Signal Oil Level Too Low
DTC P1129 meaning on BMW
DTC P1129 on a BMW indicates that the Engine Oil Level Sensor Signal shows the oil level is too low. This means that the engine oil level in the vehicle is below the acceptable threshold as detected by the sensor.
BMW DTC P1129 symptoms
Symptoms of DTC P1129 on a BMW may include:
- Dashboard warning light indicating low oil level
- Oil pressure warning light
- Engine knocking or unusual noises
- Decreased engine performance
BMW DTC P1129 causes
The common causes of DTC P1129 on a BMW include:
- Low engine oil level due to leaks or consumption
- Faulty engine oil level sensor
- Incorrect oil viscosity or type
BMW DTC P1129 seriousness
Ignoring DTC P1129 on a BMW can lead to serious engine damage due to running the engine with insufficient oil. It is crucial to address this issue promptly to prevent potential engine failure.
How to diagnose DTC P1129 on BMW
To diagnose DTC P1129 on a BMW, you can follow these steps:
- Check the engine oil level manually using the dipstick to confirm if it is indeed low.
- Inspect for any visible oil leaks under the vehicle.
- Use a diagnostic scanner to read the fault codes and confirm DTC P1129.
- Test the engine oil level sensor for proper operation.
How to fix DTC P1129 on BMW
To fix DTC P1129 on a BMW, you can try the following solutions:
- Top up the engine oil to the correct level if it is low.
- Replace the engine oil level sensor if it is faulty.
- Ensure the correct oil viscosity and type are used for the BMW model.
How to erase DTC P1129 on BMW
To erase DTC P1129 on a BMW, you can clear the fault codes using a diagnostic scanner. After addressing the root cause of the issue and fixing it, clearing the fault codes will reset the system and turn off the warning lights related to DTC P1129.
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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