Exhaust Gas Recirculation (EGR) Modification

Exhaust Gas Recirculation, also known as EGR, is a method used in modern internal combustion engines to control Nitrogen Oxides emissions, which are produced as a by-product during the combustion process.

When air from the environment combines with fuel and ignites inside the combustion chamber, temperatures increase and produce nitric oxide emissions.

The EGR system works by returning a small portion of exhaust gas to the engine's combustion chambers through the intake manifold. This lowers combustion temperatures and reduces the amount of nitric oxides emitted.

However, sometimes it becomes necessary to disable this system in the engine control unit, for example, to determine the exact cause of vehicle malfunction and eliminate other possible causes.