P255B
PTO Speed Selector Sensor/Switch 2 Range/Performance
PTO speed selector switch 2 is electrically intact but its value does not match a valid bit pattern — multiple positions asserted, or values that do not map to any preset.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Contaminated rotary contactCommon
- Sensor element aged beyond calibration windowLess likely
- Sensor mounting loose - signal dampingLess likely
Parts involved
- Pto Speed Selector 2
P255B 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.