Computer has detected a problem with the emissions controls. Fix ASAP. Generally this is an emission problem, it could be something as simple as your fuel cap is not on or it could be much more costly such as an O2 sensor. If the light is just "on" the problem is not critical, but you can not pass emission testing. If the light is "flashing" you should head straight for the dealer for repair. One quick fix - this has worked for me twice - is to disconnect the battery for a few minutes, this will re-set your computer and might turn the light off. answer take it to a auto parts store (auto zone ) they will put a computer on it and it will read a code and tell u the problem is. they should not charge u for it You may also check the wires leading to the rear O2 sensor. They pass over the drive shaft held in place by a clip. The clip hasbeen known to come loose and allow the wires to drop onto the drive shaft. They will then wear and cause the check engine light to come on.
There are several reasons why a check engine light could be on a 1995 Jeep Cherokee Sport. A few reasons are a loose gas cap, spark plugs, or low oil.
There are pages and pages of codes, have it checked by a scanner and then diagnosed from there.
The check engine light on a 2005 Jeep Grand Cherokee looks like this... Here is a link Check Engine Light It looks like a little yellow engine.
When my jeep cherokee alternator went bad, the check engine light came on and I didnt have a clue what was going on until my volt guage was reading in the red zone. When I replaced my alternator, the light went off. So in my opinion i wouldnt consider the check engine light as a alternator light.
If the check engine light has illuminated have the vehicle scanned for codes. The codes may lead you to the culprit.
Perhaps you have a leak in your transmission. Check the transmission fluid while the car is running. DO NOT check any other fluids while the engine is running.
A flashing check engine light normally means you have a misfire.
Have a shop check the AC system pressure
check pcv it maybe plugged
If the check engine light is flashing that means an engine cylinder misfire has been detected
There are pages and pages of things that can cause a check engine light. Have the code checked with a scanner.