Powertrain, generic (extended)

P255E PTO Speed Selector Sensor/Switch 2 Circuit Intermittent/Erratic

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P255E concerns short dropouts or rapid changes on the PTO speed selector 2 signal that do not match deliberate operation. Selector 2 is often the remote control on the body, close to pumps, booms or spreaders, so vibration, spray water and cable movement hit it harder than an in-cab switch. Ram's 2012 chassis cab guide shows the effect of spurious transitions: in remote mode a quick off-on toggle advances to the next of up to five preset speeds, so a flickering contact can step the engine through speeds nobody asked for. No manufacturer publishes P255E. CARB expects such circuit faults to be monitored continuously. P255A would be a permanent open circuit; P254E is the same symptom on selector 1.

Likely causes

Spray water or moisture in the body-mounted remote switch
Cable to the remote control flexing at a boom or hinge
Loose crimp or terminal in the selector 2 circuit

Symptoms

  • Engine steps through preset speeds unexpectedly
  • PTO speed unstable while working
  • Code appears only under vibration

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–250
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

pto speed selector 2

Related codes

P255AP255BP255CP255DP254E

References: law.cornell.edu, http:.