OBD Codes List

Diagnostic reference · P255B

P255B

PTO Speed Selector Sensor/Switch 2 Range/Performance

System
Speed and idle control (P code)
Lamp
Check Engine Light
Category
Powertrain - Computer and Auxiliary Controls

What it means

P255B means PTO Speed Selector Sensor/Switch 2 Range/Performance.

Where it lives

For P255B, the part to look at first is the sensor named here.

Check these first

  • A PTO speed selector 2 signal outside its expected range
  • Incorrect adjustment of the PTO speed selector sensor 2
  • Corrosion at the PTO speed selector sensor 2 connector
  • A mechanical fault in the PTO drivetrain

What to do next

  1. Read PTO speed selector sensor 2 on a scan tool
  2. Compare the signal to the commanded PTO speed
  3. Check the adjustment of the PTO speed selector sensor 2
  4. Inspect the PTO drivetrain for mechanical faults
  5. Replace the PTO speed selector sensor 2 if the adjustment and drivetrain test good
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.