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P0886 – BMW DTC

BMW DTC P0886 – TCM Power Relay Control Circuit Low

DTC P0886 meaning on BMW

DTC P0886 in a BMW refers to the Transmission Control Module (TCM) Power Relay Control Circuit Low. This diagnostic trouble code indicates that the TCM has detected a low voltage condition in the power relay control circuit.

BMW DTC P0886 symptoms

Symptoms of DTC P0886 in a BMW may include:

  • Transmission shifting issues
  • Engine stalling
  • Reduced fuel efficiency
  • Illuminated Check Engine Light

BMW DTC P0886 causes

Common causes of DTC P0886 in a BMW include:

  • Faulty TCM power relay
  • Short circuit in the power relay control circuit
  • Loose or corroded electrical connections
  • Defective TCM

BMW DTC P0886 seriousness

DTC P0886 should be addressed promptly as it can lead to drivability issues and potential damage to the transmission system. Ignoring this code may result in further complications and increased repair costs.

How to diagnose DTC P0886 on BMW

To diagnose DTC P0886 on a BMW, follow these steps:

  1. Use a diagnostic scanner to retrieve the fault codes.
  2. Inspect the TCM power relay and related wiring for any visible damage.
  3. Check the voltage at the power relay control circuit using a multimeter.
  4. Perform a continuity test on the circuit to identify any open or short circuits.

How to fix DTC P0886 on BMW

To fix DTC P0886 on a BMW, consider the following:

  1. Replace the faulty TCM power relay if necessary.
  2. Repair any damaged wiring or connectors in the power relay control circuit.
  3. If the TCM is defective, replace it with a new unit.
  4. Clear the fault codes and perform a test drive to ensure the issue is resolved.

How to erase DTC P0886 on BMW

To erase DTC P0886 on a BMW:

  1. Use a diagnostic scanner to clear the fault codes.
  2. Disconnect the vehicle’s battery for a few minutes to reset the system.
  3. Reconnect the battery and start the vehicle to ensure the code has been 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

← All BMW Diagnostic Trouble Codes

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