BMW DTC P055D – Engine Oil Pressure Sensor/Switch ‘B’ High
DTC P055D meaning on BMW
DTC P055D on a BMW indicates an issue with the Engine Oil Pressure Sensor/Switch ‘B’ registering a high signal. This fault code is triggered when the engine control module (ECM) detects that the oil pressure sensor or switch is reporting a pressure that is higher than expected.
BMW DTC P055D symptoms
Symptoms of DTC P055D on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Oil pressure warning light may come on
- Loss of power or engine performance
- Engine may run rough or stall
BMW DTC P055D causes
Common causes of DTC P055D on a BMW include:
- Defective oil pressure sensor or switch
- Wiring or connector issues in the oil pressure sensor circuit
- Low engine oil level or oil pressure
- Faulty engine control module (ECM)
BMW DTC P055D seriousness
Ignoring DTC P055D on a BMW can lead to potential engine damage due to incorrect oil pressure readings. It is important to address this issue promptly to prevent further complications.
How to diagnose DTC P055D on BMW
To diagnose DTC P055D on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM
- Inspect the oil pressure sensor and its wiring for any visible damage or corrosion
- Test the oil pressure sensor using a multimeter to check for proper resistance values
- Verify the engine oil level and pressure are within specifications
How to fix DTC P055D on BMW
To fix DTC P055D on a BMW, the following steps may be taken:
- Replace the faulty oil pressure sensor or switch
- Repair any damaged wiring or connectors in the oil pressure sensor circuit
- Ensure the engine oil level and pressure are at the correct levels
- If necessary, replace the engine control module (ECM)
How to erase DTC P055D on BMW
To erase DTC P055D on a BMW, the fault code can be cleared using a diagnostic scanner. After addressing the underlying issue causing the fault code, the ECM can be reset to clear the code and turn off the Check Engine Light.
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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