P05EF – BMW DTC

BMW DTC P05EF – Reductant Pump Supply Voltage Circuit Low

DTC P05EF meaning on BMW

DTC P05EF on a BMW refers to a fault with the Reductant Pump Supply Voltage Circuit being detected as low. The reductant pump is responsible for supplying the necessary fluid to the Selective Catalytic Reduction (SCR) system, which helps reduce harmful emissions from the vehicle’s exhaust.

BMW DTC P05EF symptoms

Symptoms of DTC P05EF on a BMW may include:

• Check Engine Light illuminated
• Reduced engine performance
• Increased fuel consumption
• Possible exhaust odor or smoke

BMW DTC P05EF causes

Common causes of DTC P05EF on a BMW include:

• Faulty reductant pump
• Corroded or damaged wiring in the reductant pump circuit
• Issues with the reductant pump control module
• Low voltage supply to the reductant pump

BMW DTC P05EF seriousness

DTC P05EF should not be ignored as it can lead to increased emissions and potential damage to the vehicle’s catalytic converter. It is important to address this issue promptly to ensure the vehicle meets emission standards and operates efficiently.

How to diagnose DTC P05EF on BMW

To diagnose DTC P05EF on a BMW, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and related data
2. Inspect the reductant pump and its wiring for any visible damage or corrosion
3. Check the voltage supply to the reductant pump using a multimeter
4. Test the reductant pump control module for proper operation

How to fix DTC P05EF on BMW

To fix DTC P05EF on a BMW, the following steps may be taken:

1. Replace the faulty reductant pump if necessary
2. Repair or replace any damaged wiring in the reductant pump circuit
3. Address any issues with the reductant pump control module
4. Ensure proper voltage supply to the reductant pump

How to erase DTC P05EF on BMW

To erase DTC P05EF on a BMW, the fault code can be cleared using a diagnostic scanner. After addressing the underlying issue causing the fault code, the scanner can be used to clear the code from the vehicle’s memory. It is important to verify that the issue has been resolved before clearing the fault 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

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