OBD Guide

B3656

Electrical Power Take Off Control Switch Circuit High

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Inability to activate the power take-off system
  • Unstable operation of the PTO system
  • Malfunction indicator light comes on

Causes

  • Short circuit to positive in the control circuit
  • PTO switch failure
  • Wiring harness damage
  • Problems with the PTO control unit

How to Fix

  1. Check the integrity of the wiring harness in the control circuit
  2. Check PTO switch resistance
  3. Check the voltage at the switch contacts
  4. If necessary, replace the switch or repair the wiring harness

Related codes

Error B3656 by Vehicle Brand