P2D81Charging Start Switch Circuit Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- P2D81 is the plausibility code of the charging start switch: the wiring reads as healthy, yet the reported switch behaviour cannot be right. Examples of what a control unit can check are a start request lasting far longer than any real press, a request that appears while no charging connector is plugged in, or a press that never produces the expected change of state. No manufacturer documents P2D81 publicly. CARB asks for rationality checks on inputs where feasible and for them to be stored separately from circuit and range faults, which is why this code stands apart from P2D7F and P2D80. The start switch in Honda's patent only mattered with the connector in place, which shows why plug state is a natural cross-check. Charging by button becomes unreliable or is disabled.
- What you may notice
- Start button works only sometimes or not at all
- Charging message about a switch fault
- Likely causes
- LikelyStart button sticking or not returning
- PossibleWorn switch contacts giving an unclear signal
- RareConnector detection signal wrong, so a valid press seems implausible
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.