Powertrain, generic · Computer and auxiliary outputs

P064B PTO Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

A power take-off (PTO) drives equipment on trucks and pick-ups – tipper, crane, hydraulic pump or winch – from the engine or transmission. A PTO control module, or the PTO function in the engine module, manages switching, working speed and release conditions; P064B reports a fault of this module or an implausible PTO request. The only manufacturer document found is a Chrysler case for Ram chassis cabs: with the PTO engaged the engine speed hunts and does not rise above about 1100 rpm, P064B sets together with the torque monitoring code P061B and the PTO switches off; the cause was software, so check upfitter installation and programming before replacing parts. CARB defines PTO units and allows monitors to pause while one is active. Thresholds and lamp status are not published; driving is usually normal.

Likely causes

Engine or PTO module software or calibration (implausible torque or speed request)
PTO equipment installed or programmed incorrectly by the upfitter
Harness, connector or supply of the PTO module or switches
PTO control module faulty

Symptoms

  • PTO switches off or cannot be engaged
  • Engine speed hunts with PTO active or stays below about 1100 rpm (Chrysler)
  • Warning lamp or stored code; driving usually normal

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–800
Time0.5–3 h

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

Parts involved

pto control modulepto switchesengine control module

Related codes

P061BP0606P0601P0610

References: law.cornell.edu, static.nhtsa.gov.