TPEM Overview

What is TPEM? TPEM or “Tier 4 Flex” is a program created by the U.S. EPA that allows original equipment manufacturers to continue selling Tier 3 engines after Tier 4 emission standards have been implemented.  The intent of this program is to help ease equipment manufacturers through the transition to Tier 4 requirements and toContinued

EPA Diagnostic and Torque Broadcasting Requirements

§ 1045.110   How must my engines diagnose malfunctions? The following engine-diagnostic requirements apply for engines equipped with three-way catalysts and closed-loop control of air-fuel ratios: (a) Equip your engines with a diagnostic system . Equip each engine with a diagnostic system that will detect significant malfunctions in its emission control system using one of the following protocols:Continued