Powertrain
generic / SAE
P2535
Ignition Switch On/Start Position Circuit High
The On/Start input reads stuck high — short to battery voltage. The ECM cannot read the crank state, modules dependent on this signal are unable to time their wake-up correctly.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 35
Possible causes
- On/Start wire shorted to battery voltage high
- Connector pins corroded - high contact resistance low
- Supply wire pinched against B+ source low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 80–500 €
- Estimated time: 0.5–2 h
- Component: ignition switch
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012