Why is the "Check Engine" light sometimes on?
The "Check Engine" light is sometimes on my 2001 Toyota Corolla. We went to a lot of places to fix it but still it comes back.
Can someone help, i hope to fix it soon.
My corolla is 2001 I had the codes run the other day. They said It is running lean and it also blows white smoke occasionally.. we have replaced the o2 sensor up front and number four coil as it suggested running better but still blowing smoke but mainly when first starting and when it warms up. what could be the problem? we also replaced leaking valve cover gasket. we have always kept oil in it.The car seems to run better since replacing #4 coil on plug. But we want to fix the lean mixture how is this done?