What is CHECK ENGINE LIGHT?
Nowadays all vehicles are coming with an onboard computer diagnostic system (OBDII) that continuously observers your vehicle's major operating systems and most importantly the power-train (engine and transmission). The main purpose of monitoring these systems is to ensure that the vehicle is operating efficiently with the lowest possible emissions. As fuel efficiency and emission control have an important role, your vehicle's electronics systems need to constantly adjust and fine-tune various parameters according to driving conditions; such as vehicle load, Speed, air/fuel mix Quantity and temperature, etc. When the computer reads that any of these parameters do not fall within the acceptable range for operating the vehicle, your CHECK ENGINE LIGHT is lit to warn you that you may have a serious problem and to take your vehicle to a certified technician.