The PCM is responsible for controlling the engine, transmission, and other major systems. Most cars have two types of computer systems: the powertrain control module (PCM) and the emission control module (ECM). Otherwise, you could end up causing more harm than good. And two, it’s important to understand what exactly will be reset when you do this. In case you reset your car’s computer in order to pass an emissions test, there are a few consequences that you may face.įor one, doing so may void your warranty. What Are the Consequences of Resetting My Car’s Computer? If it drops significantly, this could be an indication that your car is not running as efficiently as it should be. These types of trips don’t give the computer enough time to properly adjust. Second, avoid short trips as much as possible in the days leading up to the test. This means driving it around for at least 30 minutes to get the engine up to operating temperature. If you don’t have time to do this, there are a few things you can do to help pass the test.įirst, make sure your car is warmed up before taking it in for the test. How Long Do I Have to Drive My Car After Resetting the Computer?Īfter resetting your computer to pass an emissions test, you should drive a distance of about 100 miles or more for the computer to relearn your habits. This is because it takes time for the computer to relearn your driving habits and make the necessary adjustments. You need to drive your car for a distance of about 100 miles or more after resetting the computer to pass an emissions test. This is a common procedure, but do you know how long you should wait before driving your car again? When you take your car in for an emissions test, the technician will likely ask you to reset your computer.
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