Most likely you have a inoperative oxygen exhaust senser .Depending on your car,you have two for sure,up stream and down stream .Usually one is located on the right exhaust comming down from the exhaust manifold and another past the catalistic converter. You might have another one located on the left exhaust comming down off the exhaust manifold.These are expensive to replace "BY GUESSING" which one. No way to tell which one it is,unless you are advanced auto home repair,and have a manual for your car ..(HAYNES, ADVANCED AUTO STORES) and understand how to do it the inexpensive way. I purchased a CODE READ OUT module, and for each car i have owned,i have purchased a HAYNES repair manual for it. HAve a friend that has some good knowledge to guide you along.Once you spend the money for the code read out,over time it will pay for its self by you NOT having to take your car into the shop to have it hooked up to a computer to find the trouble code.That alone is usually $75.00. The oxygen sensors can cost any where from 47.00 to 90.00.each. If i have burdened you with this info,settle back and relax,this is not a difficult task.The trouble code finder can cost you 130.00 for a excellent one that you can operate with no problem.Just follow instructions that come with the trouble code finder and look through your repair manual. You not only save money also you are learning about your car and many ways to keep it in excellent operating condition. Take your time and enjoy.
Check engine is an error. You have to go at a garage to see what is the error code, then correct the problem.
You need to connect a OBD-II Scanner to find out.....
It requires a scanner to properly diagnosis a check engine light.
Either try disconnecting thebattery for about 10 mins. or have vehicle scanned to determine the problem
How do you reset check engine light for the 2009 Chevy trail blazer?
Replace your thermostat had same problem it sets a code but no check engine light
Several things could cause the 2001 Impalas check engine light to stay on. Since so many things could be wrong, check the computer codes for any leads on possible problems.
You can either bring it in to a Chevy dealer or use a programmer/tuner to reset the check engine light.
Use an OBD scan tool to reset or disconnect the battery
It means that the engine computer has detected a malfunction that will affect the emissions of the vehicle.
If the check engine light is blinking that means an engine cylinder misfire has been detected
The check engine light will illuminate.