The code was PO401 which is the DPFE sensor.
I replaced the sensor and the "check engine light" turned off. But on my way to college the next day I was going down the Freeway and the light came back on. So I did a little more research on the INTERNET and then I cleaned out the hoses connected to the DPFE sensor. And then same thing happened, the "check engine light" went away but then came back on but this time it took about 5 days for the "check engine light" to come back on. Even though the car has a lot of miles, it runs like a car that has 80,000 miles. I would just love to find out and fix this annoying vibration/shaking that is going on. If I'm stopped at a red light I can feel my body shake because of the car. But at the same time it runs really great. So weird, well maybe not I don't know much about vehicle troubleshooting.
Friday, September 25th, 2009 AT 8:21 PM