Hi guys,

I went to an tuner shop to install my Invidia Q300 dual this afternoon...right after the installation the check engine light (CEL) came on. The mechanics checked it with a computer and they said it's a faulty O2 sensor. Before I went there my car was totally fine. They told me they could order the parts for $5x (I am assuming downstream sensor since they didn't touch the header...) and charge me another $50 for installation...my question is, could it be possible that they have damaged my O2 sensor wires while they were working on the exhaust?

Thanks

Kevin

 

Did you install a test pipe or hfc with it as well or was it just cat back? Cat back install there is no need to mess with the o2 sensor. It could be a possibility they may have damaged it but, highly doubt it.

If they did install a test pipe/hfc did it come with the CEL fix for o2? If not you'll need to get antifouler. Could try to reset the ecu.

I'd never let ppl other than myself do work on the S. Try to get a fellow member to help or you could DIY save you a good chunk of cash.

 

I see. Nah I didn't get a test pipe or high flow cat. Everything below the catback is completely stock. I don't know what's happened to the O2 sensor then cause they ran a brief test hooking up a wire below my steering wheel to test what's wrong. They rechecked everything and told me the sensor is connected properly. Could it really just be a faulty sensor by chance (how small is this...) or they did something by accident...

 

If I were you, I'd just get rid of the stock cat and buy a tp or hfc. Stock cat has so much restriction.

 

Yeah I would if I could...I live in California.

 

Do you know what was the code

 

replce both sensors total under $200. , and be done with it, if light come backs on need to replcae orinal cat, been there, done that

 

I had the same thing happen on my Kia, and I asked the shop to install for free if I paid for the sensor. If it was fine when you went in and bad on the way out, why are you fully responsible? if it were my shop, id take the hit and replace it for the customer as it must have been damaged during the removal of the old and addition of the new... an o2 sensor isn't complicated for most shops or DIY mechanics....but like I said that's just how i would handle it.

I had no issues with my 02 sensor when it was swapped into a test pipe. Then again it was Billman who did the work so I didn't expect and damage to the sensor which mind you is 12 years old and still working fine..

 

Yeah but don't cars from 2000 up just use the ODBC port for inspections now? If so..you wont fail since there is no CEL. I guess Cali still does the old exhaust pipe inspection methods. Here in NY its all ODBC from what ive been told by Billman..

 

Go to an auto part store and have them pull the OBD-II codes. If you have a CEL there is at
East one set code. Also ask for any pending codes. Most likely the sensor got banged around and just needs to be cleaned or replaced. Post the code or buy the part while your at the auto part store.

Utah