P055B – BMW DTC

BMW DTC P055B – Engine Oil Pressure Sensor/Switch ‘B’ Range/Performance

DTC P055B meaning on BMW

The DTC P055B fault code on a BMW indicates an issue with the Engine Oil Pressure Sensor/Switch ‘B’ Range/Performance. This means that the signal being received from the oil pressure sensor or switch is outside the expected range or is not performing as it should.

BMW DTC P055B symptoms

Symptoms of the DTC P055B on a BMW may include:

• Check Engine Light illuminated on the dashboard
• Low oil pressure warning light
• Engine running rough or stalling
• Loss of power

BMW DTC P055B causes

Common causes of the DTC P055B on a BMW include:

• Defective oil pressure sensor
• Wiring or connector issues in the oil pressure sensor circuit
• Low engine oil level or oil pressure
• Engine oil that is too thin or contaminated

BMW DTC P055B seriousness

Ignoring the DTC P055B on a BMW can lead to serious engine damage if the oil pressure issue is not addressed promptly. Low oil pressure can result in inadequate lubrication, leading to increased friction and potential engine failure.

How to diagnose DTC P055B on BMW

To diagnose the DTC P055B on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and any related codes
2. Inspect the oil pressure sensor and its wiring for any visible damage
3. Check the engine oil level and condition
4. Perform a manual oil pressure test to verify sensor readings

How to fix DTC P055B on BMW

To fix the DTC P055B on a BMW, you may need to:

1. Replace the faulty oil pressure sensor
2. Repair any damaged wiring or connectors in the sensor circuit
3. Ensure the engine oil level and quality are correct
4. Perform an oil change if the oil is contaminated or too thin

How to erase DTC P055B on BMW

To erase the DTC P055B on a BMW, you can:

1. Use a diagnostic scanner to clear the fault code
2. After fixing the underlying issue, drive the vehicle to allow the system to recheck and verify the repair
3. If the fault does not return, the DTC P055B should be successfully erased

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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