So I bought the car with the check engine light on. The owner said its been on for a year or so. Its always been the P0420 code.
About a week ago i decided to fix the issue. Some of you may know I had issues with getting a good scan done..
Anyways I have been using a Peake FCXII it pulls up fault table 07 #28 has been the code.
I replaced the rear O2 =code came back
I replaced the Cat (weld in from muffler shop) =Code came back
Whats left the front O2?
I cant seem to find any Vacc leaks and its running good.
I really am surprised that I am not pulling up anymore codes espically if its a big enough issue to through a catalyst efficiency fault.
Please any info/ideas would be great.