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I have a 2001 RAV4 and for about 5 years now I keep getting codes saying I need to replace the catalytic converters. I clear the codes and add a fuel injection cleaner called 4K, drive it about a 100 miles and all systems reset and it passes the emissions test. This year I have driven it over 150 miles, did the drive cycle instructions and two of the systems wont reset, the catalytic converter system and the evaporative system. Any suggestions? Thanks, Kelley
 

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If you aren't getting any codes or pending codes after clearing them just keep driving and the monitors will complete. From what I've see the "drive cycle instructions" are quite nebulous and fluid depending on so many variables that I pretty much ignore trying to make the monitors complete and just drive until my scanner reads 0.
 
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