Secondary air injection switching valve.......?

So here is a summary so far of what Ive gathered:

Pump and valve codes are most common. P2440 and P2442. Per autozone the actual code is 2443 valve stuck closed.

You can get a scan gauge or .Veepeak Bluetooth OBD2 reader, torque pro app, set to scan and clear codes. This is needed to get out of limp mode.

Need to replace shit foam with the filter from Amazon. (

$20 Uni Filter UP-107 1" Clamp-On Breather

https://www.amazon.com/gp/product/B003CJOTSA/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1).

This is best to replace the shitty foam inside the Air Induction Pump that over time will break up, go into the motor and burn it.



All done it should look like this:


Reference page: https://www.tacomaworld.com/threads/secondary-air-injection-system-fix.409977/

Another more detailed take apart for the filter replacement: https://www.tacomaworld.com/threads...-a-tacoma-you-should-read-this.449563/page-16

Pump Cover replacement number: 17613-0P010

You can buy a Diverter valve here: http://toyotaparts.bochtoyotasouth.com/auto-parts/ Search: 2012>Toyota>Tacoma>(select your truck)>EMISSION SYSTEM>A.I.R. SYSTEM
OR
https://toyotaparts.bochtoyotasouth.com/oem-parts/toyota-diverter-valve-2571031022




What it looks like replacing the Valve:


Good reference page for Valve take apart: https://www.tacomaworld.com/threads/secondary-air-injection-switching-valve.381997/page-19

The Air Injection Pump is part # 176000P040

I have been suggested to buy an extended warranty (https://www.consumeraffairs.com/auto_warranty/). This would supposedly help all of us.

Lasty, buy the damn $400 Hewitt Kit, thread with info: https://www.tacomaworld.com/threads...pass-kit-2012-4-0-updated-21-oct-2016.394629/
Good for preventive and good for post issue.


Apparently the 13+ have changed the AIP and are less problematic?

It is worth asking about the Goodwill Warranty: https://www.tacomaworld.com/threads/water-pump-dealers-and-goodwill-warranty.254049/

Parts Toyota Replaces: They replaced #25710-31022, Valve Assembly, Air Switch. They replaced #17600-0P040, Pump Assembly, Air with Brackets. They replaced #17377-31010, Two Air Tubes, Two Gaskets. The summary says "Replaced air switching valve assembly, air injection pump, and gaskets."

Lastly: File a complaint: https://www-odi.nhtsa.dot.gov/VehicleComplaint/ as it is currently not under recall.

Questions:

1a) Can we get the 13-15 parts and swap it?
1b) Do we need to reset the ECU for that?

2a) What is the general consensus on the Hewitt Bypass kit? The thread above has hit or miss.

3) Do the FJ engines have this issue?

4) Do the 3rd gens have this faulty pump/valve?

5) For those in the market for a 2nd gen, do we tell them to avoid 2012-2015 years?

6) Thoughts on the extended warranty?

 

Well not necessarily at all, and in fact a few people with Toyota extended warranties have been told to go pound sand while they bend over. Problem is if you look at extended warranties they cover only listed items and systems and for all the Toyota ones they specifically don't list anything with this system. So I'd say don't waste your money on an extended warranty unless you find the AIP specifically listed as covered.

All that is changed as far as I understand is the ECU is programmed to run the AIP for a few seconds after every shutdown. Theory being this will blow out any moist or corrosive air to prevent condensation and corrosion.

Definitely do that. Same crap AIP system and failures on the Tundra and those have been covered by a TSB and warranty extension while Tacoma owners - particularly 2012 owners - are being screwed by Toyota.

Parts are the same, won't help.

An ECU update is what is needed but as far as I know doesn't exist for the 2012. Again, Toyota needs to generate a TSB and if they did it would probably involve updating the 2012 ECU.

Don't know, but AIP failures like this have hit more than one Toyota model and the Tundra is the most similar one.

No, different engine design with totally different emissions controls. So they don't have this particular kind of pump.

So far I'd say be wary of the 2012. To date the 2013-2015 seem to do much, much better with the ECU change that runs the pump at shutdown. Whether that is a total fix or just delays the problem remains to be seen.

 

Thank you.

What's your opinion on the Hewitt Bypass kit?

 

I don't have one myself (fingers crossed I won't need it) and haven't kept up closely enough with how it is working for others. If I remember correctly it was originally made for the Tundra which had these problems for a few years before the Tacoma simply because the Tundra got an AIP a few years before the 2012 Tacoma update. They then created a kit for the Tacoma. Again if I remember correctly it took a few tries to get it right for the Tacoma because the wiring harness and ECU behavior was different on the Tacomas than it was on the Tundras. All that from my memory reading up on this about a year ago so I could be remembering the details wrong!

 

Did you do the filter change? How many miles on your 2012?

 

I did do the filter change as preventative maintenance. I have a 2015 rather than a 2012 so the filter was my primary concern at this point. Truck lives in a desert and can see some high ambient temps so I worried that might break down the filter (but of course the opposite could be true and the dry air might be better for it). Changed the filter at around 13K miles and 20 months and it still looked just fine. From what I've read I think the filter is a much rarer failure mode but it is a really easy thing to do so I did it.

 

I'm really on the fence about buying a 2012. It is the exact config I want, under 25k miles, and 6 MT. Priced under 25k too. Thoughts?

 

Just completed this, a 5min job

 

Honestly this seems like a very solvable problem if you are aware of it ahead of time and budget for either doing a replacement or the Hewitt Bypass. People are right to be pissed off about it, especially those who paid for warranties that aren't covering it.

But if I saw a well cared for 2012 at low mileage in a config I liked I wouldn't let this stop me. I'd just go in eyes wide open knowing I'll probably have to deal with this at some point. Possible outcomes are:

• Fails soon after purchase and you aren't handy so you have to pay the dealer a lot for the fix
• Fails soon after purchase but you know how to turn a wrench and it is a $500 problem to replace parts
• Fails soon after and you do the Hewitt
• You just do the Hewitt anyway before it fails
  
• Takes awhile to fail and by then Toyota has owned up and put out a TSB so dealer fixes it for you
• Fails, you pay and 5 or 6 years down the road you get a post card about a class action settlement...

Look on the bright side, this is better than having the frame rust out from under you

Seriously though, a good used Tacoma in a config you like can be really hard to find many places (don't know where you live). All trucks have problems and compromises so just make an informed decision. I've got a FlipPac on the back of my truck, a product with multiple known issues, but I bought it anyway and just planned for dealing with potential problems down the road.

 

You right. I posted somewhere, a frustrated rant, about how these trucks hold value to a stupid degree. I've been searching for the past 3 years for the exact config. That was hard, but then came finding it at the right price. Some people want as much as new 3rd gen's of the same config. And they sell it confidently. Dealers want 29k for a MT DBCB OR with 50k miles. Stupid. But if you have one....good I guess?

I'd be curious to see how long it takes the average seller to sell his Tacoma. I'd also be curious how fast MT's sell. I feel there is a market for that niche that is in high demand.

 

I haven't heard of the diverted valve before. Is this a factory piece that replaces that valve assembly and corrects the problem? I'm assuming no since the HT kit seems to be talked about more. After hearing the problem came back after just 10k miles I'm ready to pony up for the HT set up but haven't heard of he diverter valve before.

 

Well my understanding is that the Air Induction Pump fails (due to moisture or the shit little foam "filter" inside the pump). So with dirt going through it gets the valves dirty and they get blocked and then you get another code. So people were buying new valves and new pumps to try and fix it because that is what toyota was doing. I think the Hewitt kit just stops that whole pump from working so it never throws the codes.

Someone please correct me if I am wrong.

Here is another question:

If we get the Hewitt kit, do we even need to get the filter since it supposedly shuts down the whole system? Did I understand that right?

 

So it sounds like the diverter valve is just a replacement to the crap one that's already there.

Unless the Hewitt kit bypasses any codes from the pump it may be a good idea to get the filter. Since I already have the filter I was just going to leave it installed if/when I get the Hewitt kit. It seems like the big issue is with the valves sticking and not so much that filter breaking down, although after seeing the filter I wouldn't be surprised if it starts to fall apart. Cheap insurance to get the uni filter.

 

I think it bypasses the system and thus does not allow it to pop codes since it is like it's "not there".

From this thread: https://www.tacomaworld.com/threads...pass-kit-2012-4-0-updated-21-oct-2016.394629/

Does anyone else want to chime in on my confusion? If you get the Hewitt BK, do you need to replace the filter, or is it all just deactivated junk post HBK install?

 

.

 

You don't need the filter or pump if you do the bypass. The pump is never used again after the bypass kit is installed...As long as the ECU has not been flashed to run the pumps post shut down. Anyone with a '13-or newer truck won't be able to do the bypass.

 

Damn. They are also having issues. Less common, but it seems as time goes on we will see more of the 13-15's reporting back.

Thank you sir!

 

I just heard back from the dealer, they offered a 50/50 split on the costs. It's fair of them, but I am really disappointed with Toyota. This is my 3rd Tacoma. This isn't something I'm willing or interested in dealing with every year. Keep in mind I had the whole system replaced 13 months and 8,000 miles ago.

 

How many miles each time it happened?

Also, have you done the Bypass kit?

 

Count me a casualty.

2012 TRD OR 4x4 DCSB 59.7k.

Austin, TX.