What are the reasons the check engine light would come on in a 2000 4-Runner?
There are way too many to list, probably a couple of thousand different things that could trigger it. When the light goes on, the engine computer stores a fault code. This is just a series of numbers or letters and numbers. You need to retrieve this code from the engine computer. Some autozone's have the equipment to diagnose a check engine light, and will do it for free if they can. Once you have the code, you can find out why the computer triggered the light, for example it may say "lean mixture", "knock", "cylinder misfire" etc. This will help you narrow down the possible causes from a few thousand to about a half a dozen things to check. If you don't understand what the fault code means, have a friend who knows a lot about cars help you. If you still can't get the problem solved, then you may have to take it to a mechanic and be satisfied that at least you tried to fix it yourself. Also, if you do have it fixed by a mechanic, be sure to ask them what caused it, most mechanics are very friendly about explaining what was wrong. That way, if in the future you get the same code, you'll know what to check first. Hope this helps. Good luck.
Why does a check engine light go on in a 1992 Toyota 4Runner with no loss of power and everything under the hood seems to be in proper order?
Will the check engine light come on if the transmission fluid is low and or is the light related to the transmission as a secondary issue?
Is it possible to hit a pot hole while driving so hard that the check engine and brake lights come on without reason as in there is no need to actually check the brakes or the engine?
Check engine light will come on for various reasons. The o2 sensors could be one of them. If your belt breaks the light will come on and the engine will over heat. I mentioned the o2 sensor because when it comes on for this reason some people have had that light on for years without replacing the sensor.
There are multiple issues that can trigger the check engine light in a Chevy S-10. A bad oxygen sensor, MAP sensor, or a loose gas cap can all be a reason that the check engine light is on. There are hundreds of reasons for the check engine light to illuminate. Ask your local auto parts store to plug a scanner into the DLC (Data Link Connector) and read the code(s) that are active.
The light could come on for a number of reasons. The vehivle would have to be hooked up to a scanner to determine the engine code or codes. After you determine the codes you can isolate and fix the probelem. If the check engine light is on there will be a computer code that will appear on the scanner.
There are several reasons the Check Engine light comes on. It could be as simple as making sure the gas cap is properly screwed on in which case the light will reset itself soon after. It could be the thermostat issues, MAF sensors, switches etc. If the light stays on permanently, you should take it to a repair shop to get the engine diagnosis done and they will tell you exactly what the problem is.