P0421

p0421 DIY Diagnosis on an "00-"05 3g Mitsubishi eclipse 2.4 4g64.
p0421 DIY Diagnosis on an "00-"05 3g Mitsubishi eclipse 2.4 4g64.

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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Mitsubishi Lancer Fix: Catalytic Converter Replacement P0421 Smog fail fix
Mitsubishi Lancer Fix: Catalytic Converter Replacement P0421 Smog fail fix

Hi Guys, This video will show you how to replace a bad catalytic converter (P0421 fix) and the steps involved in replacing it. Thank you for watch and please subscribe. “Efficiency below threshold” catalytic converter blockage Tools Needed O2 sensor socket 12 MM socket 14 MM Socket 12 & 14 MM wrench 19 MM socket […]

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P0421 Check Engine Light Fix “2001 Mazda protege 2.0 ES” (make not important!)
P0421 Check Engine Light Fix “2001 Mazda protege 2.0 ES” (make not important!)

Getting rid of check engine light for code P0421. The real fix would be anywhere from $300-$1000 and that would be a new catalytic converter i beleive (not a…

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Lancer Fix | Rough Idle / Engine Light / O2 Sensors P0421 – Ep.1
Lancer Fix | Rough Idle / Engine Light / O2 Sensors P0421 – Ep.1

Plugs 0:19, Gasket 0:27, AFS 1:39, IAC 2:19, O2S 3:07 At 2:11 shows the engine being unstable. This is a 2003 Mitsubishi Lancer ES. I’m cleaning it up from t…

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