P2794 code meaning
Gear Shift Direction Circuit Low
Powertrain system Generic code P27xx codes Check engine light
What P2794 means
P2794 means the shift direction signal, which tells the controller whether a gear is being pushed in or pulled out along its lane, reads lower than the permitted minimum. The usual suspects are a signal line rubbed through to ground, a collapsed sensor supply shared with other sensors, or water in a connector creating a leakage path to ground. Because the same supply often feeds several gearbox sensors, other low-voltage codes stored at the same time point to the supply rather than this sensor. No manufacturer documents P2794 publicly with thresholds; the test is one of the range checks CARB 13 CCR 1968.2 sets for transmission inputs. P2793 covers a missing or invalid signal and P2795 the opposite limit. With this fault the gearbox normally freezes the gear in use.
P2794 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2794
- Gearbox stays in the current gear
- Manual shift requests ignored
- Transmission warning lamp
Common causes of P2794
- Most likelySignal line chafed through to ground
- PossibleShared sensor supply pulled down by another sensor or wiring
- PossibleMoisture or corrosion in the connector
- Less likelyShift direction sensor failed low
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Shift direction sensorWiring harness
What each part of P2794 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| 94 | The exact fault in that area. |
What to do next
- Note P2794 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 P2794
What does P2794 mean?
P2794 means "Gear Shift Direction Circuit Low". P2794 means the shift direction signal, which tells the controller whether a gear is being pushed in or pulled out along its lane, reads lower than the permitted minimum. It is a generic code, so it means the same on every make.
Is it safe to drive with P2794?
Drive gently and only to a workshop. With P2794 the car can go into limp mode (reduced power) to protect itself.
Will P2794 fail an emissions test?
Yes, it can. P2794 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 P2794 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2794 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.