You bought the wrong sensor. That is an older narrowband sensor. Our primary 02 sensor is in fact a wideband 02, it just uses a 4 wire proprietary design that varies current, rather than voltage to determine lambda/afr. You can pick up a Delco replacement for about $90 if you look around, or buy one from Autozone for around $135.00 - the advantage with Autozone, is you get a 3yr no questions warranty - if it fails take it in and get a new one.

 

Hmmmmm, well that explains why the light pops on so quickly. I'll do that and post back. I spoke with Autozone, and they said they'd have to order it. But considering I haven't really driven the car in over a year, I'm sure I can wait a few days

 

I understand it's used for other vehicles and hence i used the engine code 2AZFE instead of say.. "oh u can get one from an 01-05 toyota camry..." given the camrys had the option of a v6 engine also...

Now with the engine code I cam up with the part number for your OEM Front / Pre-cat O2 sensor...

Scion tC 2AZFE, part # 89467-33080

You will see you can find this part # cross-referenced to multipl i4 2.4L toyota vehicles.. but no V6, etc etc.

I'd rather stick to OEM than take another risk...and keep trying with cheaper non-oem grade parts...

 

For the price you pay at those stores, can get a used OEM one on ebay for cheap / same price or get a new one on ebay $122.30 shipped...

 

Agreed, but instead of dealing with the headache warranty's, i'd rather just deal with someone local for a few dollars extra. Thank you though for the suggestion.

 

You are right, reading is key. Because you read either too far or skimmed the surface on everything I said.

I know you didn't say all ebay parts are those found at the mechanics. But clearly a knock off brand that nearly no one has heard of isn't going to be the same you can get at Auto Zone and such. There is a very real reason why Ebay is known for knock offs, sure you can find a good deal, but at least make sure you are buying a brand name.

Physical appearance of an o2 sensor means nothing, they all look nearly the same. The only true differing factor will be the manufacturers stamp on the part.

The part to Fongyz was to show that the same diameter o2 sensor can be used for a variety of different vehicles and isn't always vehicle or motor specific. Obviously the primary and secondary measure different things, I told you that earlier. But once again, that reading will be key. I offered my help and advice without trying to be a jerk. Take it if you like it, but you messed up by buying an ebay knock off and frankly you seem a bit mad. I'll just go ahead and not waste my money on stupid knock offs and thinking an S pipe caused a cel.

 

Thanks. Read thendawg's post post above. Maybe it'll shed some light about our cars. He's been on this forum just as long as I have. My apologies if my words cam off harsh, unfortunately communicating via web forums can be misinterpreted, and frequently are. Additionally, I just get tired of people say "this and that" about purchasing parts from e-bay. Please keep your opinions about the aforementioned to yourself.

Also, just so you know, the early production tC's in '04/'05 had different primary O2 sensors. They were flawed from the factory and required that the ecu be "recalibrated" pursuant to a TSB. It was then resolved later in 2005 for the '05-'10 models. Thendawg is correct that the O2 sensor I was sold was not a "knockoff" rather, it is incorrect for my year.

 

Weird, I didn't know May 2008 was the same as Feb 2006. Just as long eh? 2 years as long? And while it may be fine that he said it was incorrect, you cannot make a wideband into a narrowband and so forth. While the 04/05 may require a reflash (note, no tC's were branded 04's) that doesn't mean it changed o2 sensors. Congrats on cheaping out to ebay, just admit it already.

 

Lol you need to relax brutha

 

^^ LOL i know right? He got a bit worked up huh..... Anyway, thanks for your help everyone as far as an UPDATE, it appears that the crank case vent hose that goes to the intake caused bad readings for the MAF since it wasn't clamped down allowing excessive air to not be metered, which in turn threw the P0420 code. Oh and btw, I put in the replacement "el cheapo" O2 sensor from e-bay and drove it around for about 140 miles and it finally passed emissions yesterday. Thanks again for everyone's suggestions!