SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
#1
|
|||
|
|||
02 sensors before and after catalyst?
hey guys,
I am planning on redoing on exhaust within the next few weeks and seeing my check engine light is coming on im going to replace the 02 sensors as well. I know there are two O2 sensors right before the precats are these the before catalyst 02 sensors? If so then where are the after catalyst 02 sensors? And should i replace both? thanks! |
#2
|
||||
|
||||
On the 1992-1995 SVX (OBDI) there are only 2 O2 sensors, located before the two small front converters.
On the 1996-97 (OBDII) SVX's, there is a third O2 sensor, located on the rear of the main (rear) catalytic converter. I think its main purpose is just to monitor the operation of the 2 front O2 sensors. .
__________________
. Subaru Ambassador 1996 Polo Green LSi #216..138,100 miles...SOLD JFICX8659TH100216.....Date of Manufacture: November 16, 1995..... Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan In-Service Date: January 2, 1997 "The Pristine Green Polo Machine” First Polo Green on the Network First Clear front turn signals, JDM Alcyone hood emblem, rear panel, and BOXER engine cover on the Network (US) (2000) First 5000K HID factory fog lights (2007) First SVX JDM BBS wheels on a USDM SVX (2013) HID lighting (5000K) for headlight and H3 fog lights, PIAA SuperExtreme 120W high beams, rebuilt EG33 longblock, Cometic head gaskets, Phase II flexplate, AMR aluminum radiator with custom silicone hoses, 160A high-output alternator in aluminum-ceramic coated case, new design alternator wiring upgrade v.4, rare factory headlight protectors, refinished JDM BBS mesh aluminum wheels and custom, polished billet aluminum new hex center caps, LED grille mod, R1 Concepts high-carbon cryo slotted rotors, Akebono ceramic pads, Goodridge S/S braided brake lines, Smallcar Stage 1 shift kit, ThermalTech aluminum/ceramic-coated valve covers, Energy Suspension urethane front & rear swaybar bushings, Bontrager22 rear swaybar with QS Components Chromoly Teflon/Kevlar endlinks, "$15.00/5 minute" suspension mod. Hella Supertone horns, Custom stainless steel exhaust system with 2" headpipes, Magnaflow cats, AeroTurbine AR25 resonator /AWD "Bullet" muffler. R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016 2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback 2007 Mazda Miata MX-5 PRHT...102,000 miles. Plenty of parts, service and windshields. 4th Registered Network member —2/21/2001 My NEW locker..I...My Email..I..Wikipedia/SVX . . |
#3
|
||||
|
||||
The rear sensor monitors the convertor's ability to store O2, or, in other words, it's efficiency.
__________________
ASE Certified Master Automotive Technician w/L1. ASE Certified Master Medium/Heavy Truck Technician. Certified EVT (Emergency Vehicle Technician) |
#4
|
|||
|
|||
Thanks Beav
Your imput is always appreciated,
WGJ |
#5
|
|||
|
|||
thanks now i just have to order the parts!
|
Thread Tools | |
Display Modes | |
|
|