AND STILL COMING UP WITH 410PD 410 AND 404 WHAT ARE MY NEXT STEPS
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2001 Saturn SL2 Question: I HAVE 3 CODES COMING UP 410,410PD,404.CHANGED THE SECONDARY AIR SELENIOD
Answer #1cardocIII from Gillespie's Auto Service, November 23, 2013, 19:43Master
A few issues typically come up, one is the blower motors can fail. Have someone else start the car cold and make sure you hear the blower for the secondary air system run. We use the scan tool to command it on for testing purposes, and if it won't come on, that system has to be tested (if the fuse is blown, you need a motor)
The P0404 is usually caused by the EGR passages plugging up and they will need cleaned.