what are the codes i have change these parts already still getting this codes
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1997 Saturn SW2 Question: codes p0401 and p0420 what else can i change to make this work
Answer #1euromech December 19, 2011, 16:28Journeyman
Most likely those parts shuld not to be replaced at first place as i said below.
Answer #2Greg's Orange Auto (15202 Answers) , Orange, CA - (714) 361-9386globalhelper December 19, 2011, 16:30Master
YOUR EGR SYSTEM HAS SERVERAL PARTS TO IT, WHAT PARTS HAVE YOU ALREADY CHANGED.ALSO YOUR PO420 CODE PERTAINS TO CATT EFF. BELOW THRESHOLD WHAT HAVE YOU CHANGED THERE
Answer #3mastertech6371 December 19, 2011, 20:04Master
401 is an egr code that may be a clogged passage rather than a bad egr valve. stop throwing parts at it and have it cheked correctly.
420 is a bad cat. it must be replaced.