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P056D – BMW DTC

BMW DTC P056D – Reductant Control Module System Voltage

DTC P056D meaning on BMW

DTC P056D on a BMW refers to an issue with the Reductant Control Module System Voltage. This diagnostic trouble code indicates that there is a problem with the voltage levels within the Reductant Control Module system.

BMW DTC P056D symptoms

Symptoms of DTC P056D on a BMW may include:

  • Check Engine Light illuminated
  • Reduced engine performance
  • Possible decrease in fuel efficiency

BMW DTC P056D causes

Common causes of DTC P056D on a BMW may include:

  • Faulty Reductant Control Module
  • Issues with wiring or connectors in the Reductant Control Module system
  • Low battery voltage

BMW DTC P056D seriousness

DTC P056D should be addressed promptly as it can affect the performance and emissions of the vehicle. Ignoring this code may lead to further issues with the Reductant Control Module system.

How to diagnose DTC P056D on BMW

To diagnose DTC P056D on a BMW, a mechanic may perform the following steps:

  1. Use a diagnostic scanner to retrieve the fault codes
  2. Inspect the Reductant Control Module and related components for any visible damage
  3. Check the battery voltage and connections

How to fix DTC P056D on BMW

To fix DTC P056D on a BMW, the following steps may be taken:

  1. Replace the faulty Reductant Control Module if necessary
  2. Repair any damaged wiring or connectors in the system
  3. Ensure the battery voltage is within the correct range

How to erase DTC P056D on BMW

To erase DTC P056D on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. Once the issue has been addressed and fixed, the code can be cleared to reset the Check Engine Light.

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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