P2536Ignition Switch Accessory Position Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- P2536 is the general fault of the accessory input, the signal that is live when the key or start button is in the accessory position and that on many vehicles also acts as a wake-up line between body and powertrain modules. The code does not say whether the line is open, low or high, only that its state cannot be used. No manufacturer documents P2536 publicly. The best analogue is P2537, which GM evaluates in engine and transmission modules; in bulletin PIT5308 GM explains that the ECM and TCM receive a 12 V accessory wake-up from the body module on circuit 5985. A faulty accessory line can disable functions that need modules awake with the engine off, such as remote start. Low and high levels are P2537 and P2538.
- What you may notice
- Remote start or key-off functions not working
- Accessories behave inconsistently in the accessory position
- Likely causes
- PossibleFault in the accessory feed or wake-up output of the body module
- PossibleLoose or corroded terminal on the accessory line
- RareWorn accessory contact in the ignition switch
- Repair
- Medium · Usually a job for a workshop.Typical cost: €10 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.