Cataclean and EGR Clog Codes

I’ve accepted it’s the cat but I’m wondering if I need to replace the sensors associated with it as well

 

Don’t have the expertise to confirm if they’re malfunctioning. I can post videos of some other tests but no one comments on them and I don’t know what I’m seeing so eh, gotta read more or something.

I did an evap system check this morning with my scan tool. Somehow that cleared all the codes but it would not go through all the steps of the test. There’s probably a leak in the vacuum line somewhere or the vacuum pump is bad?

I really hate Toyota’s sole propriety of tech stream. It makes sense to limit access to people because then they won’t go to the dealer for repairs if they can figure things out on their own but man, the software locks have killed my wallet. I tried the pirated version but wasn't successful with installing.

 

new cat will just be a bandaid. I have yet to do a transmission flush or interverter coolant replacement on this vehicle. My experience with coolant during the engine swap was pretty bad. Imagine seeing your “new” engine overheat while you bleed the coolant.

I’m praying I can get to that after the cat. My shocks are clanking now and possibly the sway bars are loose. There’s one tire worn out and holding on a thread. Fun stuff.

 

Any recommendations on what to use clean them?

 

If I could connect the thinkdiag dongle to tech stream instead of a mini vci that would be awesome. I don't have a 32 or 64 bit laptop to use.

 

Since the evap system check test I haven’t gotten any codes.

 

P0401 appeared again. i tried operating the vacuum pump but I couldn’t hear it. Could p0401, p0441, p0455, and p0420 all come from a bad vacuum pump or a leak in an air hose?

 

At cold start the engine is sounding rough. Then it smooths out. My theory is I have a leak in the vacuum hose that’s connected at minute 4:25

I think the connection of the two hoses is leaking. this is throwing off the air fuel ratio and causing the motor to burn rich. In turn that’s affecting the catalytic converter readings and the egr valve isn’t opening all the way because of the loss in vacuum pressure(producing p0401). It also could be producing the evap codes(p0441, p0455).

That short hose that runs on the top of engine ripped when I tried stuffing the longer hose coming from the vacuum pump. I used a larger diameter hose to connect the two hoses and two hose clamps to seal the connection. I bet that bad seal is leaking but I just can’t hear it. See photo

thinking I should replace the short hose, which is a 2016 part, with a longer 2010 hose. I can’t find the original 2010 hose.

If the cat was really bad it would probably throw the p0420 code a lot quicker? Takes about 6 hours of driving to get p0401. P0420 comes back later on.

 

part
17650 in assembly diagram 177885A .

 

I think ultimately the mistakes I made in the engine swap will come back to haunt me. The degas bottle had a lot of pressure in it when I opened it today.

ah! Okay. Thank you for the correction. I watched a video on testing it. I figured not hearing it click meant in went bad and was part of the issue.

 

Thank you for pointing that mistake out. Makes me think I should punt this to a mechanic because I’m not going to figure it out. I just can’t rely on the ones I know locally.

 

Could what’s causing p0401 cause p0441 and p0455 and ultimately trickle downstream to cause P0420? Or is what’s causing p0420(bad cat) causing p0401 thus p0441,& p0455 are not related to them?

I’ve changed the gas cap, and p0401, p0441,p0455, came back. P0420 has not returned. Seems like the evap codes should be tackled first and the emissions codes thereafter.

Seen a few videos claiming the evap codes could cause p0401. Obviously, being a diy-er means there’s no smoke machine available. Next step would be changing the vacuum valve and visual inspection of the evap lines. Whenever I clear the check engine light and it comes back with an evap code I smell the fuel in the cabin especially with the heat on. Makes me think the vacuum valve is fubar and needs to be replaced. If it’s not that then smoke machine mechanic it is.