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Old 09-10-2021, 09:25 AM   #10
paulsome
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Join Date: Aug 2011
Location: Albany, NY
Posts: 48

2003 ION-3 Sedan
Default Re: P0420 code after new sensors/cat

Quote:
Originally Posted by fdryer View Post
Using an infrared heat gun to measure before and after catcon temps is another quiver in diy diagnostics. Any chance of getting a previously owned oem NYS or Calif catcon from an Ion in nearby junk yards?
I may check out a few local junkyards to see what's available. I miss having a U-pull it yard nearby - the parts were usually way cheaper. If nothing else, I found an Eastern Exhaust CARB certified cat online for around $550, which isn't terrible.

Just for laughs, I looked at the GM parts direct website to see what the cost of an OEM cat would set me back. Turns out they're discontinued and no longer available for purchase, at least for 2003/2004 models.
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