Posts Tagged: ESIM Evaporative Emission System

Understanding the ESIM System in Chrysler Vehicles

The ESIM Evaporative Emission System: How it works and fails Chrysler has used several different evaporative emissions testing systems over the years. Starting in 2007 Chrysler switched to the ESIM Evaporative Emission System. Prior to that, they use the Leak detection pump method from 1996-2004 and then the natural vacuum lead detection (NVLD) system from 2002-07. All Evaporative test systems are designed to monitor the integrity of the hoses/tubes that run between the throttle body/intake and the fuel tank. Some car makers use engine vacuum to generate a negative pressure … Read More