02 Sensor - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mjsivee · 06-13-2013, 01:22 PM

Does anyone know which O2 sensor is the one with the black head nearest to the rear the longer one (Primary, secondary, wideband?). I am trying to get another one because it got stripped when I installed my headers.

Do you need the o2 sensors, or bunge in order to get a tune.

Any help would be greatly appreciated....

Chimpo · 06-13-2013, 01:27 PM

Pre-cat or post-cat? I'm having a hard time understanding that first sentence.

More importantly than a tune, your car NEEDS the pre-cat one to help it run correctly. Obviously since this has a direct affect on the ECU, any tune will be not good (even stock) if this is hurt. The post-cat one is for cat efficiency (is the cat working or not).

mjsivee · 06-13-2013, 01:32 PM

I am currently running no cats in my headers.....got the Rev Works Headers..When I took off my o2 sensor the one that is closes to the rear of the car, it was stripped. I currently have a check engine light on.....I was just wondering if i actually need to go out of my way and buy an 02 sensor for my car to replace the spark plug non-fouler that is currently plugging up the hole where the o2 sensor used to be....The other o2 sensor is working find the one closes to the front of the car..... Does that make sense

Chimpo · 06-13-2013, 01:36 PM

Yes, much better. Your car is allright. Get an ECUTek tune and have them turn off the code for a faulty cat. I would believe you may have to leave the O2 plugged into the car, but I'm not sure on this. I would imagine there are two separate codes: one for cat and one for a faulty (i.e. missing/unplugged) sensor.

wparsons · 06-13-2013, 01:58 PM

Quote:

Originally Posted by mjsivee

I am currently running no cats in my headers.....got the Rev Works Headers..When I took off my o2 sensor the one that is closes to the rear of the car, it was stripped. I currently have a check engine light on.....I was just wondering if i actually need to go out of my way and buy an 02 sensor for my car to replace the spark plug non-fouler that is currently plugging up the hole where the o2 sensor used to be....The other o2 sensor is working find the one closes to the front of the car..... Does that make sense

That's not a spark plug non-fouler... that's just a plug, the non-fouler part is the tube that keeps the O2 sensor out of the direct exhaust stream and it's to prevent a check engine light, not to keep spark plugs from fouling.

06-13-2013, 01:22 PM	#1
mjsivee Member Join Date: Aug 2012 Drives: Scion FR-S Location: San Angelo, TX Posts: 87 Thanks: 11 Thanked 14 Times in 10 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	02 Sensor Does anyone know which O2 sensor is the one with the black head nearest to the rear the longer one (Primary, secondary, wideband?). I am trying to get another one because it got stripped when I installed my headers. Do you need the o2 sensors, or bunge in order to get a tune. Any help would be greatly appreciated....

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06-13-2013, 01:27 PM	#2
Chimpo Senior Member Join Date: Sep 2012 Drives: '15 STi Ltd Location: Probably a location near you! Posts: 297 Thanks: 37 Thanked 149 Times in 61 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Pre-cat or post-cat? I'm having a hard time understanding that first sentence. More importantly than a tune, your car NEEDS the pre-cat one to help it run correctly. Obviously since this has a direct affect on the ECU, any tune will be not good (even stock) if this is hurt. The post-cat one is for cat efficiency (is the cat working or not).

06-13-2013, 01:32 PM	#3
mjsivee Member Join Date: Aug 2012 Drives: Scion FR-S Location: San Angelo, TX Posts: 87 Thanks: 11 Thanked 14 Times in 10 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	I am currently running no cats in my headers.....got the Rev Works Headers..When I took off my o2 sensor the one that is closes to the rear of the car, it was stripped. I currently have a check engine light on.....I was just wondering if i actually need to go out of my way and buy an 02 sensor for my car to replace the spark plug non-fouler that is currently plugging up the hole where the o2 sensor used to be....The other o2 sensor is working find the one closes to the front of the car..... Does that make sense

06-13-2013, 01:36 PM	#4
Chimpo Senior Member Join Date: Sep 2012 Drives: '15 STi Ltd Location: Probably a location near you! Posts: 297 Thanks: 37 Thanked 149 Times in 61 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yes, much better. Your car is allright. Get an ECUTek tune and have them turn off the code for a faulty cat. I would believe you may have to leave the O2 plugged into the car, but I'm not sure on this. I would imagine there are two separate codes: one for cat and one for a faulty (i.e. missing/unplugged) sensor.

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