Code result
P2531
Ignition Switch Run Position Circuit Low
Moderate severity
What it means
The ignition switch Run-position input reads stuck low — short to ground or a permanently closed contact. The ECM cannot tell when the operator releases the switch from Run, so accessory and crank logic gets confused.
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
Run input wire shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Switch contact stuck closed
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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