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
Torque ratchet
Various ratchet extension
Hand razor blade for cleaning
Brake cleaner for cleaning
Soft brass brush
Shop rags
Gloves
Safety glasses
Jack stands, floor jack, and chocks for blocking the rear wheels
Parts Needed
1. Catalytic converter (I used, original, Part #)
Below items are included in the
I. New nuts
II. Exhaust manifold gasket
III. Flange gasket
IV. Inner and outer nuts for the exhaust manifold.
(Remember to install new or old washers)
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Hi, thank you for making this video. The mechanic told me my car has the p0421. But that's all he told me. I don't know if it's bank 1 or bank 0. I don't know which catalytic converter to replace, the one near the engine or the one under the car? Can you please help me with this? My car is a 2003, Galant, 2.4L. I already replaced both o2 sensors.
Wow seems so easy due to your detailed quite tutorial. But it seems like that 1 nut fucked up everything lmao. If there was access to it without having to pull the steering and etc the work would be cut in half.
AfzaMoto: Thanks, very good one! I wonder where you got the repair manual. Going through this+the manual at the same time would be a good combo. Also, I see autozone has catalyst alone without exhaust manifold, maybe a good option.
AfzaMoto, what was the part number for the new catalytic converter you used in this video. I would like to know because I have a 2005 Mitsubishi Lancer with the same code.
my 02 Mitsubishi lancer rpm when I start it is at 2 and 1/2 its high I think. also its slow to get to 55mph. do i need to change my cadillac converter? ?
it's very good
hello how mach the catalytic
Very detailed video man I appreciate the time you put in. Continue putting in the work and keep making videos.
pain in the ass lol
did it actually work cuase I just got that code for fail at warm up so I am replacing o2 sensor at top an cat
How do you remove the two bolts on the side of the belt(s)?
will that catalytic converter from ebay fit a 2003 lancer.
Really good video, well done!
Great video, very detailed.
where did you buy the part from? I need to buy one and can't find a good price.
i got that pita nut with a crows foot better than pulling the bracket
Great video. Very helpful!!! Thanks!
great video bro! can you do a video replacing entire AC