Lost Communication With Engine Control Module/Powertrain Control Module

Table of contents

U0100 KIA Possible Causes

  • Check for more codes
  • Faulty Engine Control Module (ECM) / Powertrain Control Module (PCM)
  • ECM/PCM harness is open or shorted
  • ECM/PCM circuit poor electrical connection

How do I fix code U0100 KIA?

  Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.

Cost of diagnosing the U0100 KIA code

  The cost of diagnosing the U0100 KIA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U0100 KIA Description

  Several control units are applied to electronically controlled vehicles. These units perform each control with information from various sensors. Thus, sharing signal information from sensors is needed, so CAN communication type whose communication speed is high and insensitive to electrical noise by spark generation is adopted to controlling powertrain (TCM, ECM, CLUSTER, ESC, 4WD, SAS, EPS). CAN communication consists of CAN-BUS HIGH, CAN BUS LOW, and two 120Ω resistance in the circuit. If the 4WD ECU doesn’t get some data from engine ECU, it sets U0100.

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