TCM Power Relay Control Circuit Low

Where it lives

For P0886, the circuit described runs through the relay. The description of P0886 reports a fault at the relay.

Check these first

• A short to ground in the relay control wire
• A failed TCM power relay
• A TCM driver that pulls the circuit low
• Corrosion at the relay connector

What to do next

1. Read the relay control state on a scan tool
2. Test the relay control wire for a short to ground
3. Check the relay coil
4. Inspect the relay connector
5. Replace the relay if it stays energized
6. Clear the code and retest

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