ok took car to Auto Zone due to engine light being on. At first they said it was the Temperature sensor the one that tells the fans to go on and off. But now the light still on. I disconnected the battery but light still stays on. So took it back to Auto Zone were they tell me it something to do with my Cat converter or my Oxygen sensors are giving bad reading. But before took it to another place I had them put there computer on and two errors came up. CAT converter and temperature sensor. They told me not to worry about the CAT converter and go ahead change the temperature sensor and the light should go out but that not the case. What do I do. I don‘t got munch $$$$ right now. between paying bills. should I take it to the dealer I bought it from since I am still paying on the car? They have a shop. Bought the car the car 1 year ago this coming January. Can anyone tell me what the most common thing that goes out oxygen sensors or CAT converter? The car only 4 years old with 70,000 miles on it.
This is why I don't like places like Autozone. It's great that they scan the codes for free but that's all they're good for. The mere fact that they told you the cat converter code won't turn on the light shows that they don't know what they're talking about. They're not mechanics, they're not service writers.they're mindless idiot part jockeys that can order up some brake pads for you. Without knowing the code it's impossible to tell you if it's the O2 sensor or the converter. If it was a converter efficiency code(which some people will think it's an O2 sensor code) that means the converter is going.but have no worries.if it's the factory converter it has a 8yr/80K mile warranty but you have to go back to a GM dealership for that. As far as the temp sensor.again we'd need the code. Are the fans coming on? Has the car overheated at all? I know $$ is tight but you need to bring it to an actual shop and let them diagnose it.listening to a mindless parts jockey will not only waste your time but more importantly waste your $$$ but buying the wrong parts because some tool behind a counter said so. So post up the codes please. Good luck! Email me if you have any other questions. EDIT: Djman is exactly what I'm talking about.to heck with having it diagnosed.just throw parts at it right? After enough $$ has been spent and enough parts have been thrown at the problem it'll eventually fix it right? Again, go to a real shop so there is no guessing, no speculation. At the very least you'll know what the problem is and if it's something you HAVE to fix ASAP or something you can let go until $$$ gets better. But again if it is that converter and it's the original GM one it's covered under the 8yr/80K mile emissions warranty.but what do I know? I only do this every day lol
Youtube, thats how i learnt lol
First off, try to turn off the light by removing the positive cable. the red one. And touching it to ground, then leaving it off for about 10 minutes before reconnecting it. The ECM will re-program itself and the check engine light should go off. If not then do the following. If it's just an emissions problem, and you live where you have to pass the emissions test, then you have to possibly change the O2 sensor. If not, and the car is sill running, And the cooling fans are running I wouldn't worry too much. The Cat convertor for a 2008 is pretty expensive. So try replacing the O2 sensor or sensors. The time to really worry about it is if the engine light starts flashing on and off. Then something is really wrong.
If the code was something like the catalytic converter failed to reach it peeks efficiency level that is a code telling that the down stream o2 sensor has sent a signal to the comp system indicating improper exhaust fumes were detected after cat.Now if you had a upstream o2 sensor error code too then the upstream o2 sensor maybe causing the odd reading after the cat converter. If you can get the code/codes pulled again and list them and better yet find a shop/shops to give you a written free estimate listing the code and the fault being the cat converter this would help especially if the error code is 100% indicating a cat converter fault.A good dealership should replace the faulty cat converter free of any charges bec it still should be covered under factory warrant.Note just be careful bec some dealerships may try to charge the customer for the scan to detect the faulty warrantied part.You shouldn't have to pay anything if it's the the cat converter that is gone regardless what some dealerships may say.Shop around and if you have to call the manufactures main customer service hotline. Hope that helps and best of luck.
