boostaru

Went ahead and soldered it because I didn’t want to wait for another part. I am seeing much more stable afr, corrections and learnings after doing this. It’s weird because I replaced it with a Denso that did match up perfectly. The car ran the same after it so I never thought it was the o2. The only difference was I got that one from O’Reilly. Not the first time I have bought shoddy things from there. I replaced my moms clutch master cylinder twice and both times it started leaking shortly after eventually leaving my mom stranded. Went Oem and problem solved. Also an alternator once. I have sworn to never buy parts from them again but figured it’s a Denso it’s gotta be good right? Anyway I also put a can of 44k in. If I don’t revive this thread that means problem solved. One thing I have noticed is there isn’t a slight dip in rpm when I snap the throttle at idle.

I believe I did get the oem sensor. At least it’s the one Max Capacity recommended and from my research it is oem.

Hey guys just got the new o2 sensor and I think I’m going to have to splice in the female connector. Is soldering the connections ok to do here? I feel like if I do it closer to the connection side it won’t get nearly hot enough to melt solder.

Thanks Scotty the difference is that I’m getting just the one code. I think I might just bite the bullet and get a OE Denso then continue down the flow chart. I’m really curious to see how fuel pressure and other systems are behaving. I just got stuck on this resistance issue, started breaking into a beautiful wiring harness and getting overwhelmed. Wanting to fix the resistance issue I just have no idea how. The wires quickly become lost in a massive bundle that’s really well packaged.

Funny you guys say that, I just replaced it about a month ago with oreilly Denso. Can their product vary that much?

Mods list below.. so I was cruising at about 40 in fifth gear when the check engine light came on. Pulled over immediately and checked it to find a PO2096 thrown. I have done an extensive amount of research and found a bunch of people going down the route of replacing sensors and such with no Avail. I figured before I go the same path I should go into the manual and start down the flow chart Subaru has provided. At step 5 (I believe), they had me check pin 8 and 9 on one of the connectors at the ecm to ground...pin 9 was below the specs at 1milliohm. The suggestion was the fix the ground fault short in the harness between the ecm and front O2 sensor. I am looking at the harness between the two and it looks flawless. I started with some simple connection areas that may have been suspect but they are so clean and nothing has been disturbed. I really don’t want to start breaking into this wiring harness if nothing is wrong with it. My questions are, is there something else that could be causing this? A poor connection inside the front O2, something in the ecm. Where might I even start looking for this ground fault? Should I assume it’s good and move to the next step? My resistance is in the killiohms on either pin 8 or 9. Cant quite remember but one is within spec. If someone with time could measure theirs? I don’t expect it but worth a shot. I have also been experiencing fluctuations in a/f ratio at idle so maybe I’m on to something. Maybe some suggestions on where to start looking. I’m just rambling at this point. Thanks in advance. - 7500 on engine build -year 2008 -6 Speed manual -COBB Top Feed 1050x Fuel Injectors -Stock Rebuilt EJ255 Spec B w/ race bearings -11mm oil pump with Stock heads by Outfront Motorsports -Custom turbo upgrade VF52 20g PNP and Powder coated with upgraded 1bar/14psi wastegate by SoCal porting -Modified stock TGV Deletes PNP by SoCal Porting -Process West Vert Mount TMIC -Mach 2 Recirculating valve - Invidia Big Tube Header - INV -HS05SW1HDP - Invidia Downpipe Catted Divorced Wastegate - INV HS08SW1DOC -Invidia Q300 Catback Exhaust INV HS05SL1GT3 -Mishimoto Performance Aluminum Radiator - MIS MMRAD-STI-08 -Mishimoto Radiator Hose Kit Black Subaru MIS MMHOSE-STI-08BK COBB -Top Feed 1050x Fuel Injectors (312150) -COBB Silicone Turbo Inlet (724400-BK) -COBB SF intake system (724100) -COBB SF Airbox (724150) -COBB 3-Port Boost Control Solenoid (BCS) (715750) -AEM High Flow Fuel Pump (315450) -Grimspeed Phenolic spacers 8mm NGK spark plugs GK-2309 -Stock Sti Cluch and Flywheel, -Air Pump Delete