Error U0086 on BMW все модели

Symptoms

• Check Engine light comes on
• Incorrect operation of the vehicle's electronic systems
• Loss of communication between control modules
• Problems with diagnostics via OBD-II connector
• Dashboard malfunctions

Causes

• Open or short circuit in the communication bus circuit F
• Poor contact in CAN bus connectors
• Fault in one of the modules connected to the bus
• Wiring harness damage
• Problems with power supply to communication modules

How to Fix

1. Check the integrity of the communication bus wiring F
2. Inspect and clean the contacts in the CAN bus connectors
3. Check power and ground of communication modules
4. Disable the modules one by one to identify the faulty one.
5. Check the resistance and integrity of the bus terminators

FAQ

Error U0086 on other vehicles