U117C – BMW DTC

BMW DTC U117C – Lost Communication with Battery Sensor 1

DTC U117C meaning on BMW

DTC U117C on a BMW indicates a communication error between the vehicle’s control module and the battery sensor 1. The control module is unable to receive data from the battery sensor, which can affect the vehicle’s performance and potentially lead to other issues.

BMW DTC U117C symptoms

Symptoms of DTC U117C on a BMW may include:

• Check Engine Light (CEL) illuminated
• Inaccurate battery voltage readings on the dashboard
• Issues with the vehicle’s start-stop system
• Reduced fuel efficiency

BMW DTC U117C causes

The possible causes of DTC U117C on a BMW include:

• Loose or corroded battery sensor connections
• Faulty battery sensor
• Wiring issues between the battery sensor and control module
• Control module failure

BMW DTC U117C seriousness

While DTC U117C may not directly impact the drivability of the vehicle, it is important to address this issue promptly. Ignoring communication errors between critical components like the battery sensor and control module can lead to further electrical system malfunctions and potential safety hazards.

How to diagnose DTC U117C on BMW

To diagnose DTC U117C on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s control module.
2. Inspect the battery sensor connections for any signs of damage, corrosion, or looseness.
3. Check the wiring harness between the battery sensor and control module for continuity and integrity.
4. If necessary, perform a battery sensor test using specialized diagnostic equipment.

How to fix DTC U117C on BMW

To fix DTC U117C on a BMW, consider the following steps:

1. Ensure the battery sensor connections are secure and free of corrosion.
2. Replace the battery sensor if it is found to be faulty or damaged.
3. Repair or replace any damaged wiring between the battery sensor and control module.
4. If the control module is determined to be the issue, it may need to be reprogrammed or replaced by a qualified technician.

How to erase DTC U117C on BMW

To erase DTC U117C on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault codes stored in the vehicle’s control module.
2. After clearing the codes, perform a test drive to ensure the issue has been resolved.
3. If the Check Engine Light does not reappear, the DTC U117C has been successfully erased.

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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