"00"05
In this video I go over how I found the true cause of a p0421 code, I also done this on my 8th gen 2003 Mitsubishi Galant and on a few friends cars too, it seems to be a common problem on 1999-2005, 4g64 2.4 Mitsubishi engines, with the front catalytic converters, a lot of […]
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