P273DGear Shift Control Module A Supply Voltage High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P273D is the over-voltage counterpart of P273C: the gear shift control module A, the electronic selector of a by-wire gear selection, registers a supply above its permitted maximum. No manufacturer documents P273D publicly or names the limit. Excess voltage typically comes from the charging side – a regulator that has failed, jump-starting with a 24 V source or a booster left on – and may also be misread if the module's own measurement drifts. Audi gives an example of the latter on 2019–21 A6/A7 models: the selector lever J587 judged its voltage too strictly, logged faults and blocked range selection until a software update. Modules usually protect themselves by ignoring inputs, so expect a selector warning and a gearbox that holds its current range.
- What you may notice
- Selector or gearbox warning in the cluster
- Range selection blocked
- Other over-voltage faults in several modules
- Likely causes
- LikelyAlternator voltage regulator overcharging
- PossibleJump-start or charger delivering excessive voltage
- RareSelector module misjudging its supply (software or hardware)
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.