OBDII Code List

U0100 MAZDA - Lost Communication With Engine Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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U0100 MAZDA Possible Causes

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

First diagnose U0100 MAZDA code

    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 terminals.

Cost of diagnosing the U0100 MAZDA code

    Labor: 1.0

    The cost of diagnosing the U0100 MAZDA 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.

U0100 MAZDA Possible Symptoms

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

U0100 Mazda Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) 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. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module.
OBDII Code U0100 Mazda - Lost Communication With Engine Control Module -

U0100 MAZDA More Information

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