have vehicle scanned to determine the problem
Reduced engine power may be many things but the reduced engine power will also throw a trouble code. Get that information to diagnose your problem. If the check engine light is on steady it is usually OK to drive however if it is flashing you must shut the engine off. A rich running condition will cause your catalytic converter to overheat and melt. www.trailvoy.com All the answers for your Envoy and more!
There are pages and pages and items that can cause a check engine light. You need to have it checked for codes with a scan tool. After repair light can be shut off with scan tool.
With an OBD2 scan tool.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Have vehicle scanned to determine the problem and have codes cleared
It is only necessary when the computer recognizes a problem with it. You will have a check engine code. Mine triggered a code " low output " for about 6 months before I changed it, it was still operating ok and not affecting engine performance but the minor fault was picked up by the computer.
By having the problem repaired that caused the light to come on and speed to be reduced.
That means the engine is running HOT. Need to check the coolant level and check for coolant leaks.
Get a code reader from Autozone or a friend and plug it into the OBDII connection to read what code caused the check engine light to illuminate. A flashing check engine light indicates to NOT drive any further.
The obdII connection is on the right side of the steering column mounted on the edge of the the lower dash panel.
You will need to check the dash controller to make sure that it is operating correctly first for both sides..............
There are pages and pages and items that can cause a check engine light. You need to have it checked for codes with a scan tool. After repair light can be shut off with scan tool.