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Old 11-24-2015, 01:21 PM   #1 (permalink)
Join Date: May 2011
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clayjars is on a distinguished road
Default Codes and CATS continued

Well I am going to post this for any 2007-2009 SX4 owner wondering what the heck is happening to their SX4 and the CEL coming on. The P0420 code is the front cat not working anymore and needing replaced. The P0031 is a hard starting issue due to oxygen sensors worn out and both CATS plugged up.
The best solution is replace both oxygen sensors with Suzuki genuine parts. The computer goes nuts if you use any other oxygen sensor but the factory Suzuki part numbers. Yes, $500 total on discount or more. The CATS can be found aftermarket and are around $500 total for both.
If you think this really sucks and it does, price out how much the same job is for a 2012 SX4. Over $4,000. Yikes!
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