P273CGear Shift Control Module A Supply Voltage Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- Gear shift control module A is the electronic selector used where the gearbox is shifted by wire – lever, rotary knob or push buttons – which turns the driver's choice into a message for the transmission control module. P273C means the supply voltage that this module sees, or reports, has fallen below its lower limit. No manufacturer documents P273C or its threshold publicly. A weak supply matters because a selector that resets or browns out can no longer confirm P, R, N or D; the gearbox then keeps its range or refuses to leave Park. Stellantis shows how sensitive these modules are: for a rotary selector stuck in Park, its 2022 case advised pulling and refitting fuse F94 to restart the module. Check battery, fuse, feed and ground first.
- What you may notice
- Selector warning, range cannot be changed
- Vehicle will not shift out of Park
- Gear indicator flickers or goes blank
- Likely causes
- LikelyWeak or discharged 12 V battery, voltage dips at start
- PossibleCorroded fuse contact, feed wire or ground of the selector module
- PossibleAlternator or DC/DC converter not supplying enough voltage
- RareInternal fault in the gear shift module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.