Vehicle Communication Bus E (+) High

Check these first

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

What to do next

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

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