P0920: Gear Shift Forward Actuator Circuit / Open [forward motion, odd gears, 1,3,5]
MediumPowertrainTransmission
What does P0920 mean?
P0920 is a diagnostic trouble code indicating "Gear Shift Forward Actuator Circuit / Open [forward motion, odd gears, 1,3,5]". This means there is an electrical break in the transmission wiring — a connector may be unplugged, a wire broken, or a component has failed internally. The ECU detected no signal where it expected one.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Harsh or delayed gear shifts
- Transmission slipping
- Vehicle stuck in one gear (limp mode)
- Intermittent warning lights
Estimated repair cost
Typical range in Australia (parts + labour)
$300 – $3000 AUD
Common causes
- Damaged or corroded wiring harness
- Loose or disconnected electrical connector
- Failed transmission sensor or actuator
- Blown fuse in the related circuit
- Poor ground connection
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code P0920 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.