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  1. 03 WRX No mods CEL p0420 bank 1 cat code

    General Maintenance, Troubleshooting & Accidents.
    Hi all, I have an 03 WRX that is bone stock and had a code p0420 for bank 1 cat. I changed out the downpipe/stock cat with a Bosal "oem" cat. Looks to be pretty much the same minus all the heat shielding the factory cat has. I also put on new multi layered steel gaskets to ensure the whole...
  2. P0244 over boosting

    General Maintenance, Troubleshooting & Accidents.
    Hello guys im new here I have 2005 legacy gt 2.5 124k mileage completely stock besides turbo wastegate. I recently got turbo replaced with another stock vf40 turbo.(used) and new turbo got mamba wastegate on it. i was pulling my car and i got p0244 code. I can’t solve the problem can you guys...
  3. Can broken turbo inlet cause p0420

    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 ???
  4. High Flow Cat

    Everyday Impreza Talk
    ok i have a 09 wrx and i want to get a high flow cat. i was wondering if i get one how do i keep the CEL off?
  5. CEL code P1139

    General Maintenance, Troubleshooting & Accidents.
    P1139 Front oxygen (A/F) sensor #1 heater circuit performance/range problem.. Ive gotten this code 3 or 4 times in the last 2 months maybe and I have absolutely no Idea where to start?? What does this even mean?? Thank You guys in advance :)
  6. Replaced TGV valves now i have a bad idle

    General Maintenance, Troubleshooting & Accidents.
    Just replaced my tumble generator valve and sensors now my car is bogging down and can barely stay running, checking for air / vaccum leaks but nothing yet, anyone have any suggestions thats ever done this before??? NEED HELP PLEASEEE :sadwave:
  7. HIGH RPM????? D:

    New Member Introductions
    Hey guys Anyway I was on the internet and searching for answers on how to solve my car’s problem I have an 04 wrx and my problem is everytime my buddy starts my car its RPM is already in 1500 and the CEL is on, my buddy checked my car and he said he found a hose that was tangled, he untangled...

    Engine Modifications
    i have an 04 wrx wagon i keep getting a CEL:mad: for a misfire but it comes on for different plugs everytime:confused: i dont know if its because of the mods i have or if there is something else that is causing the light to come on checked the plugs and they seemed fine MODS sri headers...
  9. wrx eratic idle, CEL list. tryna figure this out..P0851, P1153, P1152..

    General Maintenance, Troubleshooting & Accidents.
    05 wrx, stage 1, catback, cobb intake Fixed my power issue (stock uppipe was clogged by a broken apart cat... :( ) so i played safe and got a used td04 mated to a 2.5in catless UP. Now im having these weird a** idle issues...cold start the car idles up to around almost 2.5k then drops and sits...
  10. 2011 WRX | CEL P0301 - Cylinder 1 Misfire Detected

    General Maintenance, Troubleshooting & Accidents.
    I was out with my buddy taking some pictures with his Si and I noticed when we left one of our locations we were shooting at I had a CEL. When we got to our next destination just a few seconds later I pulled out my ScanLink OBDII dongle and read the codes and emailed them to myself. Below is...
  11. HELP! Misfires and what i bellieve is "limp mode" :((

    Engine Modifications
    Okay so, just recently bought an 05 limited rex with 36k miles. Ran fine the day we test drove it and then the day we got it it was acting strange. was originally told it was a TPS and it got some bad gas and that i was supposed to run it out and fill it up and w.e still no good. went back next...
  12. Need help with AP on 06 WRX

    Tuning: Electronic Engine Management
    I have a CEL on and its pulling two codes. I dont have the codes with me right now but they are dealing with emissions. I'm new to this but I can turn those codes off right? I know I have to get a new map, maybe a custom one. My car is stock and just starting to mod it but I need to get around...
  13. CEL PO447 & PO224 EMISSIONS

    General Maintenance, Troubleshooting & Accidents.
    what would cause this cell po447 the cel is on a 2004 subaru wrx/sti P0447 Evaporative Emission Control System Vent Control Circuit Open from what i have been reading its saying to check your gas cap and if not the gas cap then what? the previous owner also says it cannot fuel up at full...
  14. just bought a REAL clean 02 wrx two days ago and....

    General Maintenance, Troubleshooting & Accidents.
    Random CEL came on while driving home from work? Now I'm driving home from work and I see a yellow light in my dash. "Check engine" it says. -cries- I just got the freakin car two days ago:confused:! Anywho... Any help as to what this may be a result of? The car still runs great. No odd sounds...
  15. BOV Recirculation kit help

    General Maintenance, Troubleshooting & Accidents.
    Heres the deal guys, I need to pass emissions next week with my 2002 WRX and my CEL won't go off after trying many things. Im pulling up code P0102 for low voltage to MAF. I've replaced my filter and MAF sensor and looked for leaks and I havent been able to find anything. However, i just noticed...
  16. car not driving right after new turbo

    Engine Modifications
    hello everyone, today i finished installing vf39, sti intercooler, and the light blue 07 sti injectors. I know i need to tune the car after these mods but i broke the obdII connector or whatever its called for the cobb ap i ordered a new connector so it should be here by tomorrow or tuesday. I...
  17. Cattless Downpipe + Cobb AP Stage II Tune

    Engine Modifications
    I have an 02 WRX and am currently in the market for a downpipe. I am wondering if I run a cattless turboback system if my Cobb Accessport Stage II tune will prevent the car from running to lean or rich given the new readings the cattless system will produce on the O2 sensors. I was looking at...
  18. Probelms after installing Carbon-Ti

    Engine Modifications
    Hey I'm not sure if this is even where to put this but I need MAJOR help. I have an 02 wrx. The boost is up pretty high. I just had a full Turboback catless HKS Carbon Ti exhaust put on. Now I'm getting flashing check engine light with code saying camshaft position sensor malfunction. it...
  19. blow off

    Engine Modifications
    could someone please tell me.. i recently installed a hks bov that discharges to the atmosphere.. ever since then my baby runs like crap, cel is on and it dies when i stop at stop lights!! how can i over come this
  20. inspection needed help!!!

    General Maintenance, Troubleshooting & Accidents.
    ok ok ok i know it might sound like every other posts on here about passing inspections, but i have a unique situation. i have a 2002 wrx, stage four with supporting mods ( vf22, greddy front mount, so and so on...), my problem is this: i have no check engine lights, because my accessports and...