P2671 – BMW DTC

BMW DTC P2671 – Actuator Supply Voltage ‘B’ Circuit High

DTC P2671 meaning on BMW

DTC P2671 on a BMW indicates an issue with the Actuator Supply Voltage ‘B’ Circuit being too high. This fault code is triggered when the Engine Control Module (ECM) detects that the voltage supplied to the actuator exceeds the specified limit.

BMW DTC P2671 symptoms

Symptoms of DTC P2671 on a BMW may include:

• Check Engine Light (MIL) illuminated
• Reduced engine performance
• Engine stalling or hesitation
• Difficulty starting the vehicle

BMW DTC P2671 causes

Common causes of DTC P2671 on a BMW include:

• Faulty actuator
• Short circuit or open circuit in the actuator supply voltage ‘B’ circuit
• Issues with the wiring or connectors in the circuit
• Defective Engine Control Module (ECM)

BMW DTC P2671 seriousness

DTC P2671 should not be ignored as it can lead to drivability issues and potential engine damage if left unresolved. It is recommended to address this fault code promptly to prevent further complications.

How to diagnose DTC P2671 on BMW

To diagnose DTC P2671 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
2. Inspect the actuator and its wiring for any visible damage or loose connections.
3. Check the voltage output of the actuator supply voltage ‘B’ circuit using a multimeter.
4. Perform a continuity test on the circuit to identify any open or short circuits.
5. If necessary, test the ECM for proper functionality.

How to fix DTC P2671 on BMW

To fix DTC P2671 on a BMW, you can try the following solutions:

1. Replace the faulty actuator if it is determined to be the cause of the high voltage.
2. Repair any damaged wiring or connectors in the actuator supply voltage ‘B’ circuit.
3. If the ECM is faulty, consider replacing or reprogramming it as needed.
4. Clear the fault codes using a diagnostic scanner after the repairs have been completed.

How to erase DTC P2671 on BMW

To erase DTC P2671 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. Follow these steps:

1. Connect the diagnostic scanner to the OBD-II port of the vehicle.
2. Select the option to erase fault codes from the ECM.
3. Follow the on-screen prompts to complete the process.
4. Once the fault codes have been cleared, start the vehicle to ensure the Check Engine Light is no longer illuminated.

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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