The Chrysler Leak Detection Pump (LDP) is a fuel vapor recovery system installed on most Chrysler vehicles. It detects evaporative emission control system leakages and helps reduce harmful hydrocarbon emissions from the vehicle's exhaust, thus protecting the environment. The LDP works by creating a vacuum that draws air through the fuel tank and charcoal canister. The air passes through the hose connected to an activated carbon-filled filter where hydrocarbons are absorbed into it. When the amount of hydrocarbons reaches a certain level, it triggers an electrical signal to activate a purge valve, which then releases some of these hydrocarbons into the engine intake manifold so they can be burned off during normal combustion rather than being released as pollution. As long as there are no leaks in your vehicle’s evaporation control system, this process will keep you compliant with environmental regulations while helping improve your car’s performance and efficiency at the same time!