OBD Guide

P1598

Power Take Off Engine Speed Request Signal Message Counter Incorrect

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Unstable engine operation
  • Problems with PTO activation
  • Intermittent operation of additional equipment

Causes

  • PTO speed sensor malfunction
  • Damaged PTO wiring harness
  • Contact corrosion in PTO circuit
  • PTO module malfunctions
  • ECU software problems

How to Fix

  1. Check the integrity of the PTO wiring harness
  2. Clean contacts in PTO connectors
  3. Check PTO speed sensor
  4. Test the PTO module
  5. Update ECU software

Related codes

Error P1598 by Vehicle Brand