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P1D27 – BMW DTC

BMW DTC P1D27 – A/C Compressor Motor Voltage Sensor ‘B’ Circuit High

DTC P1D27 meaning on BMW

DTC P1D27 indicates a fault with the A/C compressor motor voltage sensor ‘B’ circuit on a BMW vehicle. This fault code specifically points to a high voltage reading detected by the sensor, signaling a potential issue with the A/C compressor motor voltage sensor ‘B’.

BMW DTC P1D27 symptoms

Symptoms associated with DTC P1D27 on a BMW may include:

  • Malfunctioning air conditioning system
  • Reduced cooling performance
  • Warning light illuminated on the dashboard

BMW DTC P1D27 causes

Possible causes of DTC P1D27 on a BMW include:

  • Faulty A/C compressor motor voltage sensor ‘B’
  • Wiring or connection issues in the sensor circuit
  • Internal fault in the A/C compressor motor

BMW DTC P1D27 seriousness

While DTC P1D27 may not directly affect the drivability of the vehicle, it can lead to discomfort due to a malfunctioning air conditioning system. It is recommended to address this issue to ensure proper cooling performance and prevent further damage to the A/C components.

How to diagnose DTC P1D27 on BMW

To diagnose DTC P1D27 on a BMW, you can follow these steps:

  1. Use a diagnostic scanner to retrieve the fault code and related data
  2. Inspect the A/C compressor motor voltage sensor ‘B’ and its wiring for any visible damage
  3. Test the sensor’s voltage output using a multimeter to verify its functionality
  4. Check for any loose connections or corrosion in the sensor circuit

How to fix DTC P1D27 on BMW

To fix DTC P1D27 on a BMW, you can consider the following actions:

  1. Replace the faulty A/C compressor motor voltage sensor ‘B’
  2. Repair or replace any damaged wiring or connectors in the sensor circuit
  3. If the A/C compressor motor is found to be faulty, it may need to be replaced

How to erase DTC P1D27 on BMW

To erase DTC P1D27 on a BMW, you can perform the following steps:

  1. Use a diagnostic scanner to clear the fault code from the vehicle’s memory
  2. After making the necessary repairs, ensure that the issue has been resolved before clearing the code
  3. Once the code is cleared, monitor the system for any recurring faults

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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