Error C0261 on GM все модели

Symptoms

• Check Engine light comes on
• Incorrect operation of several vehicle systems
• Lost connection with diagnostic equipment
• Dashboard malfunctions

Causes

• Open or short circuit in the CAN bus wiring harness
• Corrosion or poor contact in connectors
• Malfunction of one of the modules connected to the CAN bus
• Problems with power supply of CAN modules
• Damage to CAN bus terminators

How to Fix

1. Conduct CAN bus diagnostics using an oscilloscope or scanner
2. Check the integrity of the wiring harness and connectors
3. Check the resistance on the CAN bus (should be about 60 ohms between CAN-H and CAN-L)
4. Disable modules one by one to identify the faulty component
5. Replace damaged wires or faulty module

FAQ

Error C0261 on other vehicles