P09A3
Gate Select Position Circuit B Range/Performance
The gate select position circuit B reports a range/performance fault. Selector gate position cannot be reliably measured on this channel.
The gate select position circuit B reports a range/performance fault. Selector gate position cannot be reliably measured on this channel.
Common causes
- high
Position sensor failed
One of the most commonly reported causes for this code — check this first.
Typical part cost: $130-770
- medium
Wiring fault
A plausible cause — test and verify before replacing parts.
Typical part cost: $130-770
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P09A3.
Unlock causesFree 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 P09A3.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for P09A3.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does P09A3 mean?
P09A3 means "Gate Select Position Circuit B Range/Performance". 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 P09A3?
position sensor failed; wiring fault; sensor element aged beyond calibration window — 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 P09A3 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.