Code result

P09A4

Gate Select Position Circuit B Low

High severity

What it means

The gate select position circuit B reports a low fault. Selector gate position cannot be reliably measured on this channel.

Is it safe to drive?

No — stop driving

This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.

Most likely causes

  • Position sensor failed

    high

    One of the most commonly reported causes for this code — check this first.

  • Wiring fault

    medium

    A plausible cause — test and verify before replacing parts.

Get the full diagnosis

Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.

Diagnose P09A4 free

No credit card required