P2D79Charging Stop Switch Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- P2D79 covers the circuit of a charging stop switch as a whole, a button the driver presses to end external charging before the battery is full. The code is set when the switch line carries no valid signal at all; high, low, performance and intermittent faults of the same line have their own codes P2D7A to P2D7D. No manufacturer documents P2D79 publicly. The part itself is described in patents: in Toyota's design the charging ECU receives a stop signal for as long as the button is held, and Honda's older EV charger ran until the battery was full or its stop switch was turned on. Under CARB, hybrid parts a maker chooses to monitor are judged like any other input, circuit faults included. With an unreadable stop button, the car may refuse to charge or may simply ignore the button.
- What you may notice
- Charging cannot be ended with the stop button
- Charging may be refused as a precaution
- Likely causes
- LikelyLoose, corroded or unplugged connector at the stop switch
- PossibleBroken wire between stop switch and charging control unit
- PossibleStop switch itself defective
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.