Check engine light
#1
Check engine light
Iv been throwing a code for about 6 months now before i started throwing the code for my cat my mechanic changed my cat cuz i was getting back pressure cuz it was clogged. Due to this code i can not get my car inspected and my mechanic can not figure out the problem it keeps saying catalyst but he checked the cat with many test and the cat is fine barely has 5000 miles on it does any one else have this problem and maybe know how to fix it car only has 57000 miles on it
Last edited by The_Maniac; 06-03-2014 at 10:35 AM.
#4
If you put in an aftermarket catalytic, there is a good chance that the computer still sees it as a problem because they are VERY picky when it comes to cats. Nothing could be wrong with it, but it doesn't meet the stringent parameters set in the PCM.
You could get the P0420 code tuned out of the PCM, or maybe put a defouler in place of the rear o2.
#5
If you put in an aftermarket catalytic, there is a good chance that the computer still sees it as a problem because they are VERY picky when it comes to cats. Nothing could be wrong with it, but it doesn't meet the stringent parameters set in the PCM.
You could get the P0420 code tuned out of the PCM, or maybe put a defouler in place of the rear o2.
#7
Join Date: Apr 2010
Location: Mentor, Ohio
Posts: 12,188
FYI - I moved this thread out of the "MCF Problems and Issues" as this is not a problem with the forum, it' car problem. It's now in Monte Carlo Repair Help.
Also, I removed the Info prefix from the subject. This is not providing members with info.
Also, I removed the Info prefix from the subject. This is not providing members with info.
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hotrodharley
Monte Carlo Repair Help
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11-15-2013 11:37 AM