For a converter look in Eastern Catalytic or Rock Auto. The Direct Fit series.
Your car has one converter and 3 or 4 O2 sensors. The after-cat sensor is reporting low efficiency.
B2S1 is the left (front) sensor - in the exhaust manifold collector
B1S1 is the right (rear) senaor - in the to of the exhaust manifold
B1S2 (if fitted) is a pre-cat sensor
B1S3 is the after-cat sensor and is named B1S2 if there is no pre-cat sensor.
DO NOT unduly bend, twist, or kink the new sensor electrical pigtails. DO NOT get any oil or anti-seize near a sensor tip.
You MIGHT clear the code by getting to the country and performing several WOT procedures. The Northstar exhaust system needs the living dog snot run out of it once in a while. Google "cadillac forums northstar wot procedure".
OK Bass, so your opinion based on the code is that the after cat O2 sensor is bad or the cat? or both ? I did the WOT procedure a while ago and blew out my alternator had to replace that . I am gun shy now to blast it ...LOL
My car has had a check engine light on since the 2nd day I’ve owned it [Sep. last yr] and it has the same code. Last time I took it to the independent Cadillac dealer to fix a misfire they told me that the check engine light would likely return in a day or two because the catalytic converter is bad but it shouldn’t effect performance at least for now... The smog check place also told me the same thing a few months ago when it was sure to fail inspection. I still haven’t gotten around to fixing it and I’m not sure how long I should put it off for.
I drove my previous Cadillac, a 97’ Seville around for over 2yrs. with the same exact check engine light/code P0420/catalytic converter and it never missed a beat performance wise.
A CAT from Eastern has a lot less precious metals in it, thus the much lower price.
I put one on my daughters SLS and drove it from CHI to PDX without a problem. A few days later it set a P0420 code. I had her clear the codes, as I was back east. Took a few tries, but she eventually passed the emissions test. Needless to say, I'm a bit gun shy about the Eastern CATs.
All, My 125K miles DHS was taken on a 1K mile trip after changing the plugs. It ran great on the trip averaging 24.3 MPG. However when I returned, 10 miles after fueling up I accelerated out of a light and lost power. The engine was rough and the service engine soon light came on. I pulled...
I have a 2004 DeVille with the stock radio. (FM-AM, CD, CASSETTE)
-This is a Non Bose radio, & has No Navigation.
-It has the PTY button on the bottom . When pushed it reads "No Satellite radio". I know this was an option, and needs the digital radio unit & antenna to work.
My vehicle came with the BOSS sound system(Radio, IN-Dash CD, Cassette) and a 6-Disc CD Changer which is located in the glove box. I know I was told by the dealership that one can add an XM radio when the vehicle was knew. On the front of the radio, when I click on the "PTY"...
All - I have been having lots of trouble finding someone to work on my 1985 Fleetwood Brougham. A few have tried but as of today the car does not run and leaks. It almost certainly needs a thorough engine rebuild (if not a full swap) and fuel + electrical troubleshooting. Just wondering if...