Code result
P253D
PTO Sense Circuit High
Moderate severity
What it means
The PTO sense input reads stuck high — short to battery voltage or open switch return. The ECM cannot detect engagement.
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
Sense wire shorted to battery voltage
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.
Supply wire pinched against B+ source
lowLess common, but worth ruling out after the more likely causes.
Related help
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