Emission Light

It means your emission sensors are detecting a malfunction. You need an OBDII code reader to find out what the error is. If you know someone that has one of these code readers, plug it in under the dash straight down from the steering wheel. Turn on the code reader, then turn the ignition to ON (not start), then press the test button on the code reader - it should tell you a code. If it's P0401, which is commone, that's the EGR system error. There are several parts to that system. Make sure whomever fixes it is sure of what's wrong. Just changing the EGR valve often doesn't correct the error.