Vehicle sensors check for fuel-air mixture, incoming air temperature, wheel speed and manifold pressure. They tell your vehicle's computer what to do based on that information. When sensors wear out, corrode, become dirty or other problems occur will trigger the check engine light. There are more and more sensors in modern vehicles. Delcoribo can be your trustworthy wholesale partner if you want engine sensors. We produce and provide our products for most makes and models. Don’t hesitate to make an inquiry.