I'm new to the club. I bought my first Lexus last week, it is a 2004 GS300 and it has 183K on it. The person that had it took great care of it, but when he saw the P0420 & P0430 codes decided it was time to let it go. Unfortunately for me He didn't tell about the codes. I found out the next day when the engine light came on :-(. Anyway, I've been doing a lot of reading and learning a lot about the possible solutions, but I wanted to ask your advice regarding getting a complete exhaust from someone who is parting out with a car and use those cats to replace mine.
I also wanted to mention that the day I bought the car I took to get it smoged and it passed easy.
Thank you in advance for any guidance you may have,
Glad to be here.
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Check for leaks first, my car had the codes when I bought it too, but a quick wave under the cats and i felt the flutter of exhaust gas and realized that the gaskets had failed after the cats, 6$ on amazon for the gaskets replaced them and the codes were gone
Also, if is not a leak on the muffler system, check your O2 sensor. For the miles that your car have, that is the second option to check. I just change all gasket, bolts and nut in my car 2 week a go and code go out. Good lock
those codes should be for the front ones, but at this point to save money do them all at once since eventually they will all need to be replaced anyway. It would suck to spend hundreds on the fronts just to findout you need to spend more labor on the rears
The CEL went off out of the blue this morning. I was driving in to work and noticed that the light was off. what does this mean? I did my first fill up on Saturday and used 76 premium gas, but I don't know if that's the reason the light went off. I'll keep you posted if the light comes back.
Yea go to autozone and get the codes red for free since I'm assuming u don't have an obd2 scanner. Also sometimes if the gas cap hasn't been fully tightened as in hearing at least 3 clicks that can throw a CEL as well