P255A
PTO Speed Selector Sensor/Switch 2 Circuit/Open
The second PTO speed-selector switch input is open. Switch 2 typically encodes a binary or multi-bit code together with switch 1 — together they select one of several preset PTO speeds. With switch 2 broken, only the half of the bit pattern is available, so several presets cannot be reached.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open wire or unplugged switchCommon
- Pin pushed back out of connector bodyLess likely
- Cracked solder joint inside the module or sensorLess likely
Parts involved
- Pto Speed Selector 2
- Wiring Harness
P255A is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.