Thanks.

You won't be disappointed with Mobil 1, plus, you can grab the 5qt container from any Walmart for $22 (Not Extended Life, just regular Mobil1 10w30 full syn.).

 

What does "Insufficient Activity" mean ? I got a P0134 at AutoZone. They could only say it was the oxygen sensor. Could a wire be off ?

 

Insufficient activity means that the O2 sensor isn't switching from rich to lean fast enough in response to what the PCM is doing. The switch from rich to lean should happen very rapidly as the PCM adjusts the IPWs.

 

OK, so it needs replaced. Some questions then:

1) I see on the AutoZone website they offer an 'OXYGEN SENSOR SOCKET'. Does it require a special socket for removal ?

2) How many oxygen sensors are there, and I assume it/they are located AFTER the catalytic converter ?

3) Is it a one wire, two wire, or three wire ?

4) Given that, I noticed next to the ARVIN brand of replacement oxygen sensors on the AutoZone website, that the "Warranty" is listed as a "LLT" (which they just told me over the phone is a LIFETIME WARRANTY, as long as you own the vehicle).

Given the price is the same or about $10 more (dependent on the number of wires), this sounds like a good deal, eh ?

'97 4.3LV6 4DR 4WD

 

For any OBD2 blazer, you will have 3 O2 sensors. 2 pre-cat, one off the drivers side of the exhaust y-pipe, and the other right before the 'y' in the y-pipe on the passenger side. The 3rd is located behind the cat and is only there for catalyst monitoring, meaning the pcm does not use it to calculate the proper IPWs.

AC Delco AFS105 (PN: 25312200) O2 sensors cost me $75 each from my local AC Delco store. Nice thing about having a local AC Delco store is that they keep the dealerships honest with their costs. GMPD.com has good prices, but kill you with their shipping and handling - very rarely do you get your parts in a timely manner as well. The AFS105 is used in all 3 positions on the '96-'00 (possibly newer S-series Blazers).

These O2 sensors are 4 wire heated sensors so the AVRIN 'universal' sensors would not work. I would never recommend anyone get any of the 'universal' type O2 sensors. These sensors are highly sensitive to additional resistance in the wires. Even the connections made in the 'universal' sensors can cause premature problems. Plus, these sensors breath through the wires for their reference O2 content. If you were to cut off that flow of outside air, your sensor would fail.

Check with your local dealership for their price for the AFS105s. If you would like, I could purchase the AC Delco's from my local store and mail them to you directly (USPS priority + USPS padded envelope). I would have to see what those prices would be, but I wouldn't expect it to be more than $10 to send them.

My total cost for 2 AFS105s was $162.52 out the door. For the Bosch from Autozone, it would cost ~$115 (inc tax). I'd rather spend the extra $50 than have to worry about when they were going to give out on me again.

My parents are going through this with their '97 Caddy STS that has 4 O2 sensors 2 of which are a MAJOR pain. My dad had replaced them with Bosch sensors and 3 of the 4 went out just after the 3 month warranty ran out. They now have All AC Delco's in and the car is running MUCH better than it ever did with the Bosch according to my scans.

 

(I see this is also being discussed in another thread, but since the codes are different, I’ll keep it here)

OH.

So if I’m getting a P0134, how do I know which one it is ? Or should I get it read somewhere else ? The guy at AutoZone said it was not specific as to which one it was (this is when I thought there were only two), just that it mentioned the O2 sensor.



One of my local parts stores always sold Delco parts, I’ll have to check with them. Plus I should be able to get 20% off.



Bummer. A Lifetime Warranty would have been nice.

 

P0134 - HO2S Circuit Insufficient Activity Bank 1 Sensor 1

Refer to the attached image to see where B1S1 is located.


[IMG]local://upfiles/667/A6724BB1537C4D9B9B4626871F30C451.gif[/IMG]

 

As an FYI, my '96 (OBD2) has 4 O2 sensors. One from either side of the engine, one pre-cat and one post-cat.

 

I think the change was part way through the '96 model year.

 

THANKS !

I saw the pic in the other thread, but I didn't know which sensor was indicated by that code.