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#help #wrx 2002 2003 2004 2004 wrx 2005 2007 2008 2009 2010 2011 2011 wrx 2016 wrx accesport accessport advice boost bov brakes bugeye buying advice cel check engine light clutch cobb cobb accesport coilovers dam dropping downpipe ej20 ej205 ej25 electrical engine engine swap exhaust feedback knock flywheel for sale hatchback hawkeye head gasket head unit headlights help help !! help !!! ilold impreza incentives intake intercooler jdm knock leak manual misfire mod modification mods new buyer noise o2 sensor oem oil perrin radiator rebates repair rims sale spoiler springs spt stage 1 stage 2 sti stock subaru subaru wrx suspension swap tires tranny transmission transmission manual troubleshooting tune tuning turbo wagon wastegate wheel wheels wheels and tires wing wrx wrx 02 wrx 08-14
  1. Engine Modifications
    Hello all! I have a 2021 wrx with 20k miles. I got cel P0420 AFR is at 14.7 while driving. I have a Grimspeed v2 gesi catted j pipe, remark catback as well. I’ve had Jpipe installed for about 3 months and exhaust for a year or so. Car is pro tuned at the moment. Any idea what it could be before...
    cel codes p0420 p0420 obd-ii trouble code
  2. General Maintenance, Troubleshooting & Accidents.
    Hello i have a 2012 WRX Premium with 80k miles recently i had a check engine light come one. When i put it on the scanner it came up with P0172 so i cleared code and bought up and down stream o2 Sensor. I installed Down Stream o2 sensor and when i went to install upstream it was the wrong...
    check engine light o2 sensors p0172 p0420 obd-ii trouble code troubleshooting
  3. 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 ???
    cel p0420 p0420 obd-ii trouble code
  4. 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...
    o2 sensor p0420 obd-ii trouble code
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