What it means
PTO speed selector 2 input reads stuck high — short to battery voltage or analog signal pegged at maximum.
At a glance
- Usually lights the check-engine light
How it works
PTO speed selector switch 2 reports the operator’s selected PTO speed to the control module. This code sets when its input remains above the expected electrical range, consistent with a signal shorted to battery voltage or an input stuck at its maximum.
Common causes
Most likely first.
- Switch wire shorted to battery voltage
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check-engine light
- PTO speed selection may be unavailable or incorrect
- PTO operation may be limited
How to diagnose it
- Record freeze-frame data and monitor PTO selector 2 live data while selecting each position to confirm that the input stays high.
- With the PTO disengaged, inspect switch 2 wiring for pinching or contact with a powered wire or terminal.
- Check the selector 2 connector for corrosion, loose pins, or damage that could connect the signal to a supply circuit.
- Move the harness gently while watching live data to see whether the high reading changes with harness position.
- Test the signal circuit for a short to voltage and check the switch output against the manufacturer's specification.
Common fixes
- Repair wiring pinched against a powered source or other damaged insulation.
- Clean and reseal a connector with moisture or corrosion, and repair faulty terminals.
- Correct a loose or misplaced harness that allows the signal to contact a supply wire.
- Replace PTO selector switch 2 if its output remains high after the circuit is verified.
Can I keep driving?
Normal driving may be possible, but PTO speed selection or operation may be limited or incorrect. Avoid using PTO-driven equipment until you can verify that the selected speed is being recognized.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.