P258EPTO Enable Switch Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- P258E is the plausibility check of the power take-off enable switch. The line is not open or shorted – those faults are P251A to P251C – but the state of the switch does not fit the other PTO inputs, for instance an enable request without a valid arming step or contact signals that contradict each other. GM lists P258E among the PTO module codes in UI Bulletin 80C for Silverado and Sierra chassis cabs: the in-cab rocker delivers three mode signals that the module decodes so that every press is cross-checked, and an upfitter's remote enable switch only works if the arming button was pressed within five seconds before. GM warns upfitters against load-engage switches because they defeat these diagnostics. The truck still drives; the PTO refuses to engage or drops out.
- What you may notice
- PTO cannot be switched on or switches off unexpectedly
- Driver information message about PTO conditions
- Likely causes
- LikelyPTO switch contacts worn or contaminated, mode signals disagree
- PossibleUpfitter wiring or load-engage switch interfering with the enable input
- PossibleRemote enable used without arming sequence or with wrong switch type
- RarePTO module configuration not matching the installed switches
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.