P258E code meaning
PTO Enable Switch Performance
What P258E means
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.
P258E at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P258E
- PTO cannot be switched on or switches off unexpectedly
- Driver information message about PTO conditions
Common causes of P258E
- Most 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
- Less likelyPTO module configuration not matching the installed switches
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pto enable switch
What each part of P258E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 8E | The exact fault in that area. |
What to do next
- Note P258E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P258E
What does P258E mean?
P258E means "PTO Enable Switch Performance". P258E is the plausibility check of the power take-off enable switch. It is a generic code, so it means the same on every make.
Is it safe to drive with P258E?
P258E does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P258E fail an emissions test?
P258E is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P258E to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P258E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.