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<p>several individual control modules (a PCM often controls both the engine and the transmission).</p>

<p>Some modern motor vehicles have up to 150 ECUs. <a href="page.php?w=Embedded_software">Embedded software</a> in ECUs continues to increase in line count, complexity, and sophistication. Managing the increasing complexity and number of ECUs in a vehicle has become a key challenge for <a href="page.php?w=original_equipment_manufacturer">original equipment manufacturers</a> (OEMs).</p>

<p><big>Types</big></p>
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* <a href="page.php?w=Generic_industry_controller_naming">Generic industry controller naming</a>Is</p><p>
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