P2536
Ignition Switch Accessory Position Circuit
Ignition switch / body wiring
Generic OBD-II
Low
What it means
P2536 sets when the computer sees a problem with the signal that tells it the ignition key is in the accessory (ACC) position. It's a switch-and-wiring fault, so the engine still starts and runs. The usual effect is incorrect accessory-power detection, sometimes affecting features that depend on knowing the key position, along with the warning light.
Low
Can I keep driving? Yes — the engine runs normally. This circuit reports the key's accessory position, so effects are usually limited to accessory power and a warning light.
Common symptoms
What you'll notice
- Check-engine light on
- Accessories may behave oddly in the ACC key position
- Features that rely on the ignition-position input may not work correctly
- Engine typically starts and runs fine
Common causes
Most likely first
- Faulty ignition switch or worn accessory-position contactsLikely
- Wiring open or shorted in the accessory-position circuitCommon
- Poor connection or corrosion at the switch or moduleCommon
- Related power-relay or fuse faultLess often
How to diagnose & fix
Work through it in order
- Check the fuses on the accessory/ignition circuits.
- Test the accessory-position signal as the key is turned through each position.
- Inspect wiring and connectors from the ignition switch to the module.
- Replace the ignition switch if the accessory contact is faulty.
- Clear the code and retest.
FAQ
Quick answers
Is it safe to drive with P2536?+
Yes. The engine is unaffected. The main symptom is incorrect accessory-position reporting, which can affect convenience features but not driving.
Can I just clear P2536?+
It returns if the switch or wiring is still faulty. Test the ignition switch circuit and repair it first.
Related codes
Often seen with P2536
Read & clear P2536 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX