BMW DTC P055A – Engine Oil Pressure Sensor/Switch ‘B’ Circuit
DTC P055A meaning on BMW
DTC P055A on a BMW indicates an issue with the Engine Oil Pressure Sensor/Switch ‘B’ Circuit. This fault code is triggered when the engine control module detects a problem with the electrical circuit related to the oil pressure sensor or switch.
BMW DTC P055A symptoms
Symptoms of DTC P055A on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Low oil pressure warning light
- Loss of engine power
- Engine stalling or rough idling
BMW DTC P055A causes
Common causes of DTC P055A on a BMW include:
- Defective engine oil pressure sensor
- Faulty oil pressure switch
- Wiring or connector issues in the circuit
- Low engine oil level or poor quality oil
BMW DTC P055A seriousness
Ignoring DTC P055A on a BMW can lead to serious engine damage due to insufficient lubrication. It is important to address this issue promptly to prevent potential engine failure.
How to diagnose DTC P055A on BMW
To diagnose DTC P055A on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the engine oil pressure sensor and switch for any visible damage
- Check the wiring and connectors for any signs of wear or corrosion
- Perform a manual oil pressure test to verify the sensor’s readings
How to fix DTC P055A on BMW
To fix DTC P055A on a BMW, you can follow these steps:
- Replace the engine oil pressure sensor or switch if found faulty
- Repair any damaged wiring or connectors in the circuit
- Ensure the engine oil level is correct and of the recommended quality
- Clear the fault code and perform a test drive to verify the repair
How to erase DTC P055A on BMW
To erase DTC P055A on a BMW, you can use a diagnostic scanner to clear the fault code from the engine control module’s memory. Once the code is cleared, you can reset the Check Engine Light and monitor the vehicle for any recurring issues.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.