rjnakata Posted September 21, 2022 Share Posted September 21, 2022 (edited) '01 Legacy GT Wagon 5MT 225Kmi: The 0420 code I'm getting along with 16 mpg suggest a clogged catalytic converter. See my other post. I'm in California and along with CO, NY, ME a CARB rated cat is required. I see new non-CARB options for about $250, but CARB's go for $850 min new. Do you have suggestions for options? Edited September 21, 2022 by rjnakata Link to comment Share on other sites More sharing options...
rjnakata Posted October 20, 2022 Author Share Posted October 20, 2022 Ok, how about gas additive CAT cleaners? Worth a try first? which? TIA! Link to comment Share on other sites More sharing options...
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