The code is p0410. First, we tried replacing air pump with used part. When the used part was on, we did hear the fan run at start up (never heard that before that I can remember and have owned the car for 11years). Mechanic said it was no good. Replaced it again with new part. Light stayed off for 2 days. When came back on, mechanic said a relay was backwards. Light stayed off for 24 hours. Back on again. Took it to autozone. Same code. Thanks for your help.
Saturday, July 21st, 2012 AT 11:25 PM