P0922 code meaning
Gear Shift Forward Actuator Circuit Low
Powertrain system Generic code P09xx codes Check engine light
What P0922 means
Set when the drive circuit of the forward shift actuator of an automated manual gearbox shows a voltage that is too low for the current switching state. This usually points to a short to ground on a valve or motor line, or to an internal short in the actuator. Many controllers then switch the output off to protect the driver stage. No manufacturer documents this code publicly. A ZF patent drives each chamber of a double-acting shift cylinder through its own solenoid valve, and an Isuzu patent runs an electric shift motor in both directions, so a fault can affect one shift direction only. CARB requires circuit checks on outputs. P0923 is the opposite high fault, P0920 the open circuit, P0926 the reverse direction. Gears in this direction are blocked.
P0922 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0922
- Transmission warning light on
- Certain gears can no longer be engaged
- Gearbox may stay in neutral or hold one gear
Common causes of P0922
- Most likelyDrive wire chafed through and shorted to ground
- PossibleInternal short in solenoid coil or shift motor
- Less likelyWater or corrosion bridging pins in the connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Gear shift forward actuatorWiring harnessTCM
What each part of P0922 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 9 | Area: transmission. |
| 22 | The exact fault in that area. |
What to do next
- Note P0922 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0922
What does P0922 mean?
P0922 means "Gear Shift Forward Actuator Circuit Low". Set when the drive circuit of the forward shift actuator of an automated manual gearbox shows a voltage that is too low for the current switching state. It is a generic code, so it means the same on every make.
Is it safe to drive with P0922?
Drive gently and only to a workshop. With P0922 the car can go into limp mode (reduced power) to protect itself.
Will P0922 fail an emissions test?
Yes, it can. P0922 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0922 to fix?
Difficulty: hard. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P0922 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.