Shift Solenoid F Control Circuit High

Where it lives

For P0999, the solenoid sits on the circuit this code reports. The description of P0999 reports a fault at the solenoid.

Check these first

• A short to power in the shift solenoid F circuit
• An open in the shift solenoid F return
• A shift solenoid F that is stuck
• A TCM driver fault
• Corrosion at the solenoid F connector

What to do next

1. Read shift solenoid F voltage on a scan tool
2. Check the circuit for a short to power
3. Test the return for an open
4. Inspect the connector
5. Replace the solenoid if it is stuck
6. Clear the code and retest

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