Powertrain
generic / SAE
P251B
PTO Enable Switch Circuit Low
The PTO enable switch input reads stuck low — typically a short to ground or a permanently closed switch. The ECM either sees PTO enabled when the operator has not requested it, or cannot release the PTO mode after work.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 1B
Possible causes
- Switch wire shorted to ground high
- Switch stuck closed medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–350 €
- Estimated time: 0.3–1.5 h
- Component: pto enable switch
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012