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U0100 LEXUS

U0100 LEXUS - Lost Communication With Engine Control Module/Powertrain Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

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

Possible symptoms

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

U0100 Lexus Description

Modules connected to the high-speed Local Area Network (LAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter module.
OBDII Code U0100 Lexus - Lost Communication With Engine Control Module/Powertrain Control Module - AutoCodes.com

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