P260A: PTO Control Circuit / Open

What it means

The controller cannot drive the power take-off (PTO) engagement line on commercial vehicles. The PTO will not engage even when commanded by the body controller or operator switch.

At a glance

• Usually lights the check-engine light

How it works

A power take-off (PTO) uses an engagement solenoid to connect an engine-driven accessory on equipped commercial vehicles. The controller monitors the PTO engagement control circuit and sets P260A when it detects an open path, such as a broken wire or open solenoid coil. The PTO may not engage, and its indicator may not reliably show the operating state.

Common causes

Most likely first.

1. Open coil in the PTO engagement solenoid
2. Broken wire to the PTO solenoid

Symptoms

• Check-engine light
• PTO may not engage
• PTO indicator may not reflect PTO operation

How to diagnose it

1. Use a scan tool to check the PTO command and status data, and note whether the fault occurs when engagement is requested.
2. With the vehicle secured and the PTO disengaged, inspect the solenoid connector and harness for breaks, looseness, corrosion, or abrasion.
3. Check the PTO solenoid coil for continuity using the manufacturer's procedure.
4. Check the control wire between the controller and solenoid for an open circuit, following the wiring diagram.
5. If wiring and coil continuity pass, verify controller output during a commanded engagement using the manufacturer's test procedure.

Common fixes

• Reconnect or clean the PTO solenoid connector.
• Repair a broken or damaged wire to the PTO solenoid.
• Replace the PTO engagement solenoid if its coil is open.
• Repair the circuit connection identified by the manufacturer's electrical tests.

Can I keep driving?

The vehicle can usually be driven if the PTO is not needed and the truck otherwise operates normally, but do not rely on PTO-driven equipment. Secure any equipment and follow its operating procedures before driving.