What are the common causes of P09A0?

An open in the shift solenoid G circuit. A backed out pin at the solenoid G connector. A break in the shift solenoid G harness. A shift solenoid G coil that has failed open. A TCM connector losing contact.

Read shift solenoid G voltage on a scan tool. Test the circuit for an open. Wiggle test the harness and connector. Measure shift solenoid G resistance. Replace the solenoid if the coil is open. Clear the code and retest.

P09A0

Shift Solenoid G Control Circuit/Open

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

What it means

P09A0 means Shift Solenoid G Control Circuit/Open.

Where it lives

For P09A0, the circuit described runs through the solenoid. The description of P09A0 reports the solenoid as open.

Check these first

An open in the shift solenoid G circuit
A backed out pin at the solenoid G connector
A break in the shift solenoid G harness
A shift solenoid G coil that has failed open
A TCM connector losing contact

What to do next

Read shift solenoid G voltage on a scan tool
Test the circuit for an open
Wiggle test the harness and connector
Measure shift solenoid G resistance
Replace the solenoid if the coil is open
Clear the code and retest

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Updated

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