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Pulling Codes: U0100 = Lost Communication with ECM/PCM
This diagnostic journey begins with a 2010 Dodge Caravan with a U0100 code – Lost Communication with ECM/PCM; a code that involves a no-communication issue with the powertrain control module.
This vehicle would communicate with generic scan tools as well as the manufacturer’s scan tool, but it would not communicate with the state's emissions equipment, and therefore, failed the emissions test.
Carlton Banks uses the wiTech and the Pico Scope to determine where the fault is hiding.
This article originally published in Tech Shop Magazine, December 2015.
Read it at TechShopMag.com.
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