CAN Communication Bus Fault

What this code means

General manufacturer-level CAN bus communication fault detected. Multiple modules may report this code simultaneously.

Symptoms

• Warning lights on
• Multiple communication DTCs
• Intermittent electrical features
• Scan tool intermittent connection

Common causes

• CAN bus wiring damage
• Module failure corrupting bus
• Poor ground connection
• Aftermarket device on CAN bus
• Termination resistor fault

Diagnostic steps

1. Check CAN bus resistance (should be ~60 ohms)
2. Scope CAN bus signals
3. Remove aftermarket devices
4. Check all CAN bus connectors
5. Isolate modules to find fault source

Repair notes

Systematic CAN bus diagnosis required. Start with bus resistance measurement and visual inspection.

Other Network codes on this vehicle