U0143
Lost Communication With Body Control Module C
U0143 is an OBD-II diagnostic trouble code meaning: Lost Communication With Body Control Module C. Common causes: open or short in the wiring between the bcm and the ecu, bcm power or ground problems. Estimated repair cost: $17–222.
Symptoms
- Failure of comfort systems (window regulators, central locking)
- Interior lighting or side lights not working
- The warning light on the dashboard is on
- Problems starting the engine (in some models)
- Malfunctions of wipers or washers
Causes
- Open or short in the wiring between the BCM and the ECU
- BCM power or ground problems
- Malfunction of the BCM module itself
- Damage to the CAN communication bus
- Software error in ECU or BCM
How to Fix
- Check BCM related fuses
- Inspect the BCM wiring harness and connectors for damage.
- Check supply voltage and ground on BCM
- Scan other modules for related errors
- If necessary, replace or reflash the BCM
Related codes
Error U0143 by Vehicle Brand
FAQ
What does the U0143 code mean?
U0143 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Body Control Module C
What causes a U0143 error code?
The most common causes of U0143 include: Open or short in the wiring between the BCM and the ECU; BCM power or ground problems; Malfunction of the BCM module itself; Damage to the CAN communication bus.
How do I fix a U0143 diagnostic trouble code?
To fix U0143: Check BCM related fuses. Inspect the BCM wiring harness and connectors for damage.. Check supply voltage and ground on BCM. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0143?
Limited driving only, diagnose soon
How much does it cost to fix U0143?
The estimated repair cost for U0143 is $17–222. Actual cost depends on your vehicle, location, and labor rates.
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