Vehicle Communication Bus B Performance

Check these first

• Intermittent opens or shorts on the Bus B
• A failing transceiver on one module on the Bus B
• Corroded or water damaged Bus B connectors
• Electrical noise on the Bus B

What to do next

1. Read the code and check module communication status on a scan tool
2. Monitor Bus B traffic for dropped or error frames
3. Inspect the Bus B connectors for corrosion or moisture
4. Check for aftermarket devices that may add noise
5. Replace the module that shows intermittent communication loss
6. Clear the code and retest

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