Code result
P251E
PTO Engine Shutdown Circuit Low
Moderate severity
What it means
The PTO engine-shutdown command line reads stuck low — usually a short to ground or a permanently asserted shutdown request. The ECM may treat this as an active shutdown command and refuse to start or keep the engine running while in PTO mode.
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
Shutdown 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
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P251E freeNo credit card required