P027C – BMW DTC

BMW DTC P027C – Fuel Pump Module ‘B’ Control Circuit Low

DTC P027C meaning on BMW

DTC P027C indicates a low voltage condition in the control circuit of fuel pump module ‘B’ in a BMW vehicle. This fault code is specific to the fuel pump module ‘B’ and is triggered when the voltage in the control circuit falls below the threshold set by the vehicle’s ECM (Engine Control Module).

BMW DTC P027C symptoms

Symptoms of DTC P027C in a BMW may include:

• Engine misfires or hesitation
• Reduced engine performance
• Difficulty starting the engine
• Illuminated check engine light

BMW DTC P027C causes

The common causes of DTC P027C in a BMW include:

• Faulty fuel pump module ‘B’
• Corroded or damaged wiring in the control circuit
• Loose or poor electrical connections
• Issues with the ECM

BMW DTC P027C seriousness

DTC P027C should be addressed promptly as it can lead to drivability issues and potential engine damage if left unresolved. Ignoring this fault code may result in poor engine performance and fuel economy.

How to diagnose DTC P027C on BMW

To diagnose DTC P027C on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors in the fuel pump module ‘B’ control circuit for any damage or corrosion
3. Check the fuel pump module ‘B’ for proper operation and voltage supply
4. Perform a continuity test on the control circuit to identify any open or short circuits

How to fix DTC P027C on BMW

To fix DTC P027C on a BMW, consider the following:

1. Replace the faulty fuel pump module ‘B’ if necessary
2. Repair or replace any damaged wiring or connectors in the control circuit
3. Ensure all electrical connections are secure and free of corrosion
4. If the issue persists, consult a professional mechanic for further diagnosis and repair

How to erase DTC P027C on BMW

To erase DTC P027C on a BMW, you can:

1. Use a diagnostic scanner to clear the fault code from the ECM memory
2. After making the necessary repairs, perform a test drive to ensure the fault code does not return

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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