March, 9, 2006 AT 6:29 PM

97 grand am 2.4 engine, convertor is turning cherry red! No power, codes read po420a twc system lo efficiency. Could this be bad convertor.

2 Answers



March, 9, 2006 AT 10:18 PM

Well I can assure you the cat is not supposed to glow red. It's probably restricted or you have excess fuel draining into the exhaust system. Based on the code that is being thrown, the catalyst in the convertor is toast.



March, 26, 2006 AT 1:27 AM

In addition to the second post, which I agree with, the true problem probably lies with something else in the fuel/emissions system. (Unless the converter is physically damaged due to a hit or something like that) You'll need to fully test out the fuel system, vacuums, etc, to find the cause, or a new converter is likely to suffer the same fate. And you will surely need a new converter to play it safe.

Please login or register to post a reply.

Catalytic Converter Replacement Volkswagen
Code Read Retrieval/Clear
Code Read Retrieval/Clear Honda Civic
 Step by Step video GMC Yukon XL 2000-2006
How to gather codes Ford Explorer