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P0703 – BMW DTC

BMW DTC P0703 – Brake Switch ‘B’ Circuit

DTC P0703 meaning on BMW

The Diagnostic Trouble Code (DTC) P0703 for BMW refers to an issue with the Brake Switch ‘B’ Circuit. This code indicates that there is a problem with the electrical circuit associated with the brake switch ‘B’ in the vehicle.

BMW DTC P0703 symptoms

Symptoms of DTC P0703 on a BMW may include:

  • Malfunctioning brake lights
  • Inability to shift out of Park
  • Problems with the cruise control system

BMW DTC P0703 causes

Common causes of DTC P0703 on a BMW include:

  • Defective brake switch ‘B’
  • Wiring issues in the brake switch circuit
  • Faulty connections or poor grounding

BMW DTC P0703 seriousness

While DTC P0703 may not directly affect the drivability of the vehicle, it is important to address this issue promptly as it can impact the safety features of the vehicle, such as the brake lights and the ability to shift gears.

How to diagnose DTC P0703 on BMW

To diagnose DTC P0703 on a BMW, you can follow these steps:

  1. Use a diagnostic scanner to retrieve the fault code
  2. Inspect the brake switch ‘B’ for any visible damage or signs of wear
  3. Check the wiring and connections associated with the brake switch circuit
  4. Perform a continuity test to ensure proper electrical flow

How to fix DTC P0703 on BMW

To fix DTC P0703 on a BMW, you can try the following solutions:

  1. Replace the faulty brake switch ‘B’ with a new one
  2. Repair any damaged wiring or connections in the circuit
  3. Ensure proper grounding of the brake switch
  4. Clear the fault code and reset the system

How to erase DTC P0703 on BMW

To erase DTC P0703 on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s system. Once the issue has been addressed and fixed, you can reset the system to remove the DTC P0703 code.

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

← All BMW Diagnostic Trouble Codes

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