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p0420 obd-ii trouble code
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  1. Maintenance, service, and repair
    So my 2010 wrx is in shop right now getting turbo Inlit replaced replaced... can that cause a catalytic threshold to come up... once I replace the hose will it go away? Or is it done for in the cat or sensor ???
  2. Tuning: Electronic Engine Management
    New member here with an on-going issue: Car: 2008 WRX Hatchback Issue: O2 Sensor keeps tripping after installing the following: Subaru 08-UP WRX/STI With High FlowCat. Down-Pipe Subaru 2008 WRX HatchBack N1 Cat-Back Cobb AccessPort (this had to be sent back as it would not flash ECU... still...
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