The little yellow check engine light I guess it is came on yesterday in my 00 Grand Caravan, wondering if anyone might know what causes this. The manual says possible emissions issue, or auto transaxle?
take it to autozone and they can read the code for Free
The most common reason is an oxygen sensor is going bad and needs to be changed. It can also come on if the gas cap was off while the car was running or the gas cap is not tight enough. Take the car to Autozone and have them scan the computer to find what codes were stored. That should tell you what caused it.
It's definitely time to go to a good shop and get the right diagnosis. It is probably an oxygen sensor, but it could be a number of other problems. The sooner you get it fixed, the better. The check engine light comes on when the engine computer detects a problem with the emissions control system, which includes the transmission.
