P260BPTO Control Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- P260B is stored when the PTO control output reads too low, the classic case being a grounded wire leading to the PTO relay coil. GM documents the code as P260B.00, a low voltage on the PTO relay control line, among the faults the PTO module can set on 2008-2014 Silverado and Sierra 3500 HD chassis cabs. That module drives both ends of an upfitter-supplied relay, energizes it when the in-cab switch requests PTO and drops it again once engine speed is back at base idle; a ground fault on its control side therefore prevents engagement. Because the relay and its wiring are added by the body builder, their routing and protection deserve the first look. P260A is the open circuit, P260C the high-side fault. The truck still drives, only the PTO stays off.
- What you may notice
- PTO cannot be engaged
- Message or flashing PTO indicator
- Likely causes
- LikelyRelay control wire chafed against the frame or body
- PossibleShorted coil in the PTO relay or solenoid
- RareRelay wired incorrectly during body installation
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.