P0907 code meaning
Gate Select Position Circuit A High
Powertrain system Generic code P09xx codes Check engine light
What P0907 means
Set when the gate select position signal on circuit A of an automated manual gearbox stays above its highest valid value for longer than a calibrated time. Typical causes are a short of the signal line to the sensor supply or to battery voltage, a broken sensor ground, or an internal sensor fault. No manufacturer documents this code publicly. The patents of Aisin AI and Isuzu on select control show that the module derives the active gate directly from this sensor voltage, so a reading above the valid band leaves it blind in the select direction; CARB requires out-of-range checks on such inputs. P0906 is the opposite low fault, P09A5 and P09A9 are the high faults of circuits B and C. For the driver this usually means a warning lamp and a gearbox that no longer changes gear or stays in a fallback gear.
P0907 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0907
- Check engine or transmission warning light on
- Gearbox stays in one gear or in neutral
- Engine may not start because neutral cannot be confirmed
Common causes of P0907
- Most likelySignal wire shorted to sensor supply or battery voltage
- PossibleOpen sensor ground or corroded ground pin
- PossibleInternal fault of the gate select sensor
- Less likelyFaulty input stage in the transmission control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Gate select position sensor aWiring harnessTCM
What each part of P0907 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. |
| 07 | The exact fault in that area. |
What to do next
- Note P0907 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 P0907
What does P0907 mean?
P0907 means "Gate Select Position Circuit A High". Set when the gate select position signal on circuit A of an automated manual gearbox stays above its highest valid value for longer than a calibrated time. It is a generic code, so it means the same on every make.
Is it safe to drive with P0907?
Drive gently and only to a workshop. With P0907 the car can go into limp mode (reduced power) to protect itself.
Will P0907 fail an emissions test?
Yes, it can. P0907 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 P0907 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P0907 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.