P2159 – BMW DTC

BMW DTC P2159 – Vehicle Speed Sensor ‘B’ Circuit Range/Performance

DTC P2159 meaning on BMW

The Diagnostic Trouble Code (DTC) P2159 for BMW refers to the Vehicle Speed Sensor ‘B’ Circuit Range/Performance. This code indicates that there is an issue with the vehicle speed sensor circuit, specifically sensor ‘B’, which is responsible for monitoring the speed of the vehicle.

BMW DTC P2159 symptoms

Symptoms of DTC P2159 on a BMW may include:

• Check Engine Light illuminated on the dashboard
• Inaccurate speedometer readings
• Problems with the vehicle’s cruise control system
• Erratic shifting behavior in automatic transmissions

BMW DTC P2159 causes

Common causes of DTC P2159 on a BMW include:

• Faulty vehicle speed sensor ‘B’
• Wiring or connector issues in the speed sensor circuit
• Corrosion or damage to the sensor or its wiring
• Issues with the vehicle’s ECM (Engine Control Module)

BMW DTC P2159 seriousness

While DTC P2159 is not typically a critical issue that will prevent the vehicle from running, it is important to address it promptly. Ignoring this code can lead to inaccurate speed readings, potential transmission issues, and a decrease in overall driving performance and safety.

How to diagnose DTC P2159 on BMW

To diagnose DTC P2159 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s ECM
2. Inspect the vehicle speed sensor ‘B’ and its wiring for any visible damage or corrosion
3. Test the sensor’s output signal using a multimeter to ensure it is within specifications
4. Check the connector and wiring for any loose connections or breaks
5. Perform a road test to verify the symptoms associated with the code

How to fix DTC P2159 on BMW

To fix DTC P2159 on a BMW, you can try the following:

1. Replace the faulty vehicle speed sensor ‘B’ with a new, OEM part
2. Repair or replace any damaged wiring or connectors in the speed sensor circuit
3. Clean any corrosion from the sensor or its connections
4. Reset the fault codes and perform a test drive to ensure the issue is resolved

How to erase DTC P2159 on BMW

To erase DTC P2159 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. After addressing the underlying issue causing the code, resetting the codes will turn off the Check Engine Light and ensure the system is operating correctly.

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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