Thank God for AutoZone and the free diagnosis!!!
Here are the codes I have..
P0133 Upstream Heated Oxygen Sensor circuit Slow Response - Bank No. 1.
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.
P0402 EGR Flow Excessive at Idle.
I cleaned out the housing behind the throttle body as shown in
this link. It wasn't anywhere near as dirty as in the pictures. It was barely dirty at all. Of course, that didn't really help anything so I'm still stuck with the 3 codes above. I've been searching the threads but really haven't found a solid answer. I'm think about replacing the O2 sensor in bank 1 but some people say that's not the cause. I'm going to change my fuel filter tomorrow. I bought the car new with 11 miles on it.. No it has 99k and I have only change the fuel filter once around 60k miles.
