Vehicle Communication Bus D (+) High

Check these first

• A short to voltage on the bus D (+) wire
• A module on bus D driving the (+) line above its normal level
• A failing regulator feeding voltage onto the bus D (+) circuit
• An added accessory backfeeding the bus D (+) line

What to do next

1. Read stored codes on every module that shares bus D
2. Measure the bus D (+) line for a short to voltage
3. Check for an accessory backfeeding the bus D (+) circuit
4. Test the charging system for an overvoltage on bus D
5. Replace the module driving the bus D (+) line high
6. Clear the code and retest

Look up another code