P09A1

Q: Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

Shift Solenoid H Control Circuit/Open

High severity

The control circuit of shift solenoid H reports a control circuit/open condition. Gear element actuation cannot be commanded reliably on this channel.

Common causes

Open in solenoid control wire
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $220-1980
Open solenoid coil
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $220-1980
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P09A1.
Unlock causes
Free forever · No credit card

First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

Get the full step-by-step diagnosis

Create a free Wrenchify account to unlock the rest for P09A1.

Unlock diagnosis

Free forever · No credit card

Related codes

See related trouble codes

Create a free Wrenchify account to unlock the rest for P09A1.

Unlock related codes

Free forever · No credit card

Frequently asked questions

What does P09A1 mean?

P09A1 means "Shift Solenoid H Control Circuit/Open". It is a generic OBD-II code that points to a fault in the transmission / hybrid-ev control.

What are the most common causes of P09A1?

open in solenoid control wire; open solenoid coil; pin pushed back out of connector body — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.

Get the full P09A1 diagnosis for your vehicle

Year, make, model + step-by-step repair help — free plan included.

Diagnose P09A1