Code result
P2534
Ignition Switch On/Start Position Circuit Low
Moderate severity
What it means
The On/Start input reads stuck low — short to ground or permanently closed contact. The ECM may see crank request when the key is at rest, blocking accessory functions or causing unexpected starter cut-off logic.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
On/Start wire shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Harness chafing through insulation
lowLess common, but worth ruling out after the more likely causes.
Related help
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