 Catalytic Converter and O2 sensors, Replace? |
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 May 4, 2004 - 7:24 PM
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 Enthusiast  Joined May 17, '03 From Florence, KY Currently Offline Reputation: 0 (0%)  |
Alright. My car hit 100,000 miles a couple of weeks ago, and about 60 miles later my check engine light comes on. I take it to autozone and the code reads "8420- Catalyst system is not performing to minimum specifications-bank1" or something like that. The dude told me it sounds like the catalytic converter, which I agree with, and that it means it's the first one (the bank 1 part). So I take my car to the local exhaust shop, and they recommend changing the catalytic converter and both O2 sensors for $550. They didn't even mention a first or second catalytic converter. Does anyone know if it's the first ro the second? How hard is it to change the sensors and cat? Can they all just be unscrewed? Also, what is a reasonable price for each. Autozone quoted me 125 for the sensors, and the muffler shop 130. What about the catalytic converter, and where could I get one of those? Would I need to lift my car to replace it?
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May 4, 2004 - 7:54 PM
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 Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
Take off the lower cat (under the car) and look at it. It's supposed to look whiteish... kinda like honeycomb or something similar. If it doesn't look like that... then it's probably the cat has gone bad. I'm willing to guess it's not the O2's unless you're running bad. They just want more money by replacing parts that don't need it. Anyways... if your car's not running really bad... you can just ignore it or replace the cat yourself. Should cost only 150-200 for a new CAT (cheaper if you go universal...but that requires welding) and it's easy to install yourself... -------------------- "It's ok to be naked girl... I'm an artist!"
1995 AT200 Celica ST: stocked out daily driver... 1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies... 1991 SW2x MR2 n/a: bare bones hardtop model soon to be... |
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May 4, 2004 - 9:57 PM
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 Enthusiast Joined Dec 30, '03 From Atlanta Currently Offline Reputation: 0 (0%) |
dont get a universal because they dont last long (about a year) and the only reason the shop told you to put in the o2 sensors as well is because that is the "easy" way for them to fix the check engine light (they dont have to diagnose anything). if you do have an inefficenty code then you will probably just need to replace the cat.
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May 6, 2004 - 4:03 PM
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Enthusiast Joined May 17, '03 From Florence, KY Currently Offline Reputation: 0 (0%) |
I asked them if I could just replace the cat, and they said I could but it's usually bad O2 sensors that make the cat go bad. I didn't really feel like he was jerking me around because I've heard that before and it was on the poster on the wall in their shop. But if you know for sure, then I'm not going to replace them. So does the cat just unbolt from the exhaust? How hard is it to get to and do this?
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