P15C3 – BMW DTC

BMW DTC P15C3 – Battery Sensor Wakeup Cable Circuit

DTC P15C3 meaning on BMW

DTC P15C3 on a BMW refers to an issue with the Battery Sensor Wakeup Cable Circuit. This diagnostic trouble code indicates a problem with the communication circuit related to the battery sensor’s wakeup signal.

BMW DTC P15C3 symptoms

Symptoms of BMW DTC P15C3 may include:

• Check Engine Light illuminated
• Battery warning light on
• Issues with battery charging
• Electrical system malfunctions

BMW DTC P15C3 causes

Common causes of BMW DTC P15C3 include:

• Faulty battery sensor
• Wiring or connection issues in the wakeup cable circuit
• Corrosion or damage to sensor connectors
• Software glitches

BMW DTC P15C3 seriousness

The seriousness of BMW DTC P15C3 lies in the potential for electrical system malfunctions and battery-related issues. Ignoring this DTC can lead to starting problems, charging system failures, and overall vehicle reliability concerns.

How to diagnose DTC P15C3 on BMW

To diagnose BMW DTC P15C3, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes.
2. Inspect the battery sensor and its connections for any visible damage or corrosion.
3. Check the wiring in the wakeup cable circuit for continuity and proper connections.
4. Perform a battery and charging system test to ensure proper functionality.

How to fix DTC P15C3 on BMW

To fix BMW DTC P15C3, consider the following:

1. Replace the faulty battery sensor if necessary.
2. Repair or replace any damaged wiring or connectors in the wakeup cable circuit.
3. Clear the fault codes and perform a test drive to verify the repair.
4. If the issue persists, consult a professional mechanic for further diagnosis.

How to erase DTC P15C3 on BMW

To erase BMW DTC P15C3, you can:

1. Use a diagnostic scanner to clear the fault codes.
2. Disconnect the vehicle’s battery for a few minutes to reset the system.
3. After clearing the DTC, perform a test drive to ensure the 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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