P258C – BMW DTC

BMW DTC P258C – Vacuum Pump Control Circuit ‘A’ Low

DTC P258C meaning on BMW

The Diagnostic Trouble Code (DTC) P258C for BMW refers to the Vacuum Pump Control Circuit ‘A’ Low. This code indicates that there is a low voltage condition detected in the control circuit of the vacuum pump in the vehicle.

BMW DTC P258C symptoms

Symptoms of the BMW DTC P258C may include:

• Check Engine Light illuminated on the dashboard
• Loss of power or acceleration
• Reduced fuel efficiency
• Strange noises coming from the vacuum pump

BMW DTC P258C causes

Common causes of the BMW DTC P258C may include:

• Faulty vacuum pump
• Wiring issues in the vacuum pump control circuit
• Defective vacuum pump relay
• Low engine oil level

BMW DTC P258C seriousness

The DTC P258C for BMW should not be ignored as it can lead to potential drivability issues and affect the overall performance of the vehicle. It is recommended to address this code promptly to prevent further damage.

How to diagnose DTC P258C on BMW

To diagnose the DTC P258C on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code
2. Inspect the vacuum pump and related components for any visible damage
3. Check the wiring and connectors in the vacuum pump control circuit
4. Test the vacuum pump relay for proper functionality

How to fix DTC P258C on BMW

To fix the DTC P258C on a BMW, you may need to:

1. Replace the faulty vacuum pump
2. Repair any damaged wiring or connectors in the control circuit
3. Replace the vacuum pump relay if necessary
4. Ensure the engine oil level is at the recommended level

How to erase DTC P258C on BMW

To erase the DTC P258C on a BMW, you can:

1. Use a diagnostic scanner to clear the fault code
2. After fixing the underlying issue, drive the vehicle to allow the system to retest
3. If the fault does not reoccur, the DTC should be automatically erased from the system

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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