What are the common causes of P07D6?

A short to power in the transmission mode switch F circuit. An open in the mode switch F ground. A faulty transmission mode switch F. Corrosion at the mode switch F connector. A TCM fault on the mode switch F input.

Read the transmission mode switch F state on a scan tool. Test the mode switch F circuit for a short to power. Check the mode switch F ground and connector. Compare the switch F state in each mode. Replace the switch if the circuit tests good. Clear the code and retest.

P07D6

Transmission Mode Switch F Circuit High

System: Transmission (P code)
Lamp: Check Engine Light
Category: Powertrain - Transmission

What it means

P07D6 means Transmission Mode Switch F Circuit High.

Where it lives

For P07D6, the switch sits on the circuit this code reports. The description of P07D6 reports a fault at the switch.

Check these first

A short to power in the transmission mode switch F circuit
An open in the mode switch F ground
A faulty transmission mode switch F
Corrosion at the mode switch F connector
A TCM fault on the mode switch F input

What to do next

Read the transmission mode switch F state on a scan tool
Test the mode switch F circuit for a short to power
Check the mode switch F ground and connector
Compare the switch F state in each mode
Replace the switch if the circuit tests good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.