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The Secondary Air Injection System Bypass Kit - Plug and Play!
The SAIS Bypass Kit - Plug and Play prevents operation of the SAIS at cold start thus letting you clear your related trouble codes, the CEL and Limp mode that are associated with a SAIS failure and will not return. This Kit Covers 2008-2012 and select 13', 14' vehicles. This version has an additional harness for conneciton to the Engine Coolant Temperature Sensor and was specifically developed to prevent a P011B, Temperture Correllation Code, that using a different unit on an 08 or newer vehicle will cause.
All wiring connections except the starter relay connection are accomplished by the Plug and Play harness. Click on images for more details! Detailed Installation Instructions are easy to follow and a printed copy is included with your order. The Plug and Play Harness provides a very clean factory looking installation that allows for the bypass module to still be hidden out of plain sight.
Here are the Common Trouble codes that the Standard Bpyass Kit can illiminate:1441, P1442, P1444, P1445, P2440, P2441, P2442, P2443, P2445, P2447
*This kit will not work with any 2012-2013 Sequoia or 2012-2013 Tundra 5.7L vehicle that have had their ECM updated with a calibration file from Toyota Technical Service Bulletin T-SB-0033-12. This is a very specific bulletin for P2440/P2442 SAIS Switching Valves Stuck Open Bank 1/2 under freezing ambient conditions. It is assumed that this ECM update will cause the secondary air system to operate at shutdown after the veihcle has reached operating temperature. At this time the bypass modules cannot prevent this. If you have a 2012-2013 Sequoia or Tundra 5.7L and this update has been performed they are supposed to place an Authorized Modification sticker on the underside of the hood somewhere near the driver side door. If the New Calibration ID starts with 30CK or 30CJ and the last 4 digits are 0300, 1300,1301,2300,2301,5300,5301, 6300, 6301, or 9300 the current bypass modules are not compatable with this Calibration File. The lack of an Authorized Modification sticker in this area is not a quarantee that this ECM update has not been performed. Please contact us directly for more information if you have questions about this.
For more information on trouble codes that Can and Cannot be cleared with the bypass kit alone... Please check our Trouble Codes Section and review the installation instructions.
Not Sure What You Need?Give us a Call TOLL FREE 1-844-307-7671 or Contact Us!
The Plug In Kit Includes:
- 1 x SAIS Bypass Module - Harnessed Plug In Connection
- 1 x Pair of Exhaust Valve No.2 Block Off Plates - Engine Specific (may be different than shown)
- 1 x 10' Piece of Violet 20 AWG TXL - Starter Relay Connection Wire
- 1 x Printed Copy - Detailed Bypass Module Installation Instructions
- 1 x Printed Copy - Block Off Plate Instructions - Engine Specific
- Weatherproof connectors for Plug and Play
- Black Poly Split Loom harness built with 3m™ Super 88+ Tape - Flame Resistant
- Custom Made Compact Solid State Electronic Module
- 4cm x 4cm x 1.4cm Black Duroplastic High Temp Enclosure - UL 94 V-0 Flame Resistance
- High Quality Automotive Engine Compartment Grade TXL Wiring
- The starter relay connection is an option ONLY available on The Original SAIS Bypass Modules.
- 3M™ Automotive Acrylic Double Sided Tape for mounting
- Black Epoxy Potted for environmental and shock protection
- Assembled 100% by hand in the USA!
- For use on Off-Road, Racing or other emissions excempt vehicles only.
- 16 gauge (1/16 inch) 316 Stainless Steel Block Off Plate Construction For Lifetime Use
- Water Jet Cut for Precision and Smoother Edges, Guaranteed to Fit Your Engine
More About the SAIS Bypass Kit
The included No.2 Exhaust Valve Block-off Plates are an integral part of the bypass kit (images may not match the plates you receive for your specific engine). The block off plates are the only way to isolate the exhaust valves and the related pressure sensor(s) from the exhaust. By completely isolating the system from the exhaust the pressure sensors are prevented from causing valve stuck open trouble codes which are the main cause of limp mode when this system fails. Even though a system is bypassed and should never run again, the Exhaust No.2 valves can still leak exhaust and cause future trouble. Installing the block off plates is the only way to prevent future valve trouble and limp mode. Again, it is just best to install and forget about it.
Not Sure What You Need?
Give us a Call TOLL FREE 1-844-307-7671 or Contact Us!
Just installed today on a 2008 Tundra 4.7L to resolve a P2443 code.
The kit worked wonderfully. The install was simple. The instructions that came with the kit were fantastic.
The total install time was about 45 minutes. Nothing about this was difficult.
Thank you, Hewitt!
If your mechanically inclined, it only takes a couple hours. Hardest part is the block off plates.
Toyota would not honor the warranty to replace the SAIS in my 2012 Tacoma 4.0L because it was Rebuilt, and wanted over $2k to fix it. I could have ordered the part and replaced it myself probably, but it still was going to be over $500, and this was going to be the first time fixing something with the engine myself. AND I read reviews that part goes bad every 10k miles or so in %u201812 Tacomas because of bad design, so I decided to take my chances with the SAIS Bypass kit instead.
Yes, yes, and yes. It paid off. It was not easy for me to figure out where everything had to connect to (it took me several hours overall), but once figured out, you%u2019ll realize it wasn%u2019t that difficult. The exhaust plates that come with the package are identical, but I came to learn that one of the SAIS ports in my vehicle was modified because that side was where it was rebuilt. All I had to do was get a metal file and grind one of the plates down a little to make it fit, tighten it back on, done.
With the 2012 model you also may not need to install the purple relay wire they give you, but just follow the directions included in the package, and Customer Support will let you know if that%u2019s the case. They were as quick and helpful as advertised. If you have any questions or problems, just contact them however you like. I cleared the CEL codes by disconnecting the battery, and have been running it for over three weeks now. No limp-mode, starts beautifully, runs great. Saved me big $$$ and I never have to worry about the part again. Thank you!
2008 Tundra 5.7L was in limp mode due to CEL being on code P2445 I found water in air injection pump regulator on bank 1 and had corrosion in the valve assembly so would obviously need new valve and air pump which was around $1200 cost in parts alone. My neighbor is a great mechanic and spoke to several other mechanics and they all recommended this option from Hewitt. It took about an hour to install with no issues. Instructions are great with excellent tips on installing the exhaust blank offs. I've only driven it 4x since installing but so far no codes and typically it would come on again after two runs before by clearing the CEL so far it's doing what's it's supposed to do. Thanks for what looks like a great way to go.
I ordered the Plug & Play SAIS Bypass Kit for my 2008 Tundra 5.7 on Thursday and paid for overnight shipping. It was delivered on Friday and it took me about 2 hours to install it. I watched the install videos that Hewitt-tech posted on youtube and it really helped. No more limp mode and all CEL are gone. I took a 200 mile round trip after the install and still no CEL. This product works.
I was stuck in Mexico, 1000 miles below the border when my Tundra went into limp
mode with the broken air valve code on my 2010 4.6 Tundra I was not looking forward to a 1000 mile drive thru mountain passes in limp mode so I ordered a bypass kit and had a friend bring it down. And it worked! Thanks for the product.
This bypass kit was a real lifesaver! The dealership quoted me at $2700 to fix the SAIS system on my 2011 Tundra. After researching the problem a bit I found this kit. I ordered it thinking I didn't have much to lose. Shipping was fast and installation was easy. Thank you so much!!!!!!!!!!
Was a life saver, well built and was seamless. The only problem I'm having now is the block off plates don't seem to be sealing. Being a supercharged truck I imagine there is a bit more exhaust going thru there so I may just have to try something else.(Crimp and weld?)
Man man man. can de put a 100 star. I installed this bypass kit I bought from Hewitt. My 2008 tundra 4.7 liter was running like shitt in limp mode with my engine light on and my PSV light flashing.all bullshitt shitt aside I ordered my bypass kit and I received it in 2 days. I installed the kit today and my truck is running like a champ. No more engine light no more PSV light flashing. Best $350 I've spent in a long time. If you have this problem dont be afraid to buy this kit.I was hesitant at first didnt think it would work. It does work LOVE IT HEWITT AND THANK YOU BECKY
Installed on 08 Sequoia sr5. Had code p2442 mechanic could not fix so I purchased this kit and it's been running fine for 18 days. I used method #2 for the block plates and it was much easier.
Excellent directions. Appreciate the heads up on using wooden dowels to separate the flanges to put the black plates in. I used a 3/4" wooden dowel rod and bottle jack to separate flanges on air induction tubes. Placed dowel on tube on back of engine, as here in bends and "rings" started. Worked like a champ. Pushed on studs first to make sure flanges were broken loose.
I have a 2008 Sequoia Limited 5.7L and I too do not usually write reviews but I have to tell everyone about this kit and the personnel at Hewitt-Tech. My Sequoia went into %u201Climp%u201D mode with the typical dash lights (sliding car icon, OFF, and flashing ESC.if I remember right) on at about 139K miles. About 6 months prior to that it happened once but I got around it by disconnecting the battery and resetting the ECU.but of course it came back and resetting the ECU didn%u2019t fix it any longer. I took it to Autozone and got the code P2440 then preceded to my mechanic. He came back with the horrible news that Toyota wanted $1,600 just for the parts and that I missed the Toyota recall/TSB by 8 months%u2026figures. Well after I dug around and found it would cost $3,000 to $4,000 to fix this issue and reading even further that it may happen AGAIN down the road (after the pumps or sensors of the SAIS fail again) I stumbled across Hewitt-Tech and looked into their kit. I was a little hesitant at first to be honest but once I talked to the main guy (Paul) I felt comfortable with his kit fix. Well here I am a month later and still rockin with my Sequoia. Thank you Hewitt-Tech for your technical help, friendly conversations, and for inventing this awesome kit for us Toyota owners. I plan to run my Sequoia another $140K so it%u2019s awesome this module is lifetime warranted. Take care Hewitt-Tech and Thanks Again!
I have a 2012 Tacoma that I bought at the end of 2018 with 100k miles on the clock. Everything was fine for a couple of months then the engine light and trac light came on. I took it to Toyota and they told me it was going to be $1,400 to fix the problem. So I hopped on the forums and saw that everybody was having this issue and that%u2019s when I came across this kit. I called them up and spent probably 20 minutes on the phone with a really nice guy! He answered all of my questions and when I had the money saved up I purchased it. When I received the package I was very impressed with detailed instructions and photos! It took a little longer then I expected because the ECT sensor is quite hard to get to, but got it done in about 1.5 hours. While I was working on installation I had disconnected the battery and when I reconnected there was no check engine light. My truck has been running great ever since! Thank you Hewitt-tech!
I typically do not write reviews, but felt like I had to on this. Becky did an outstanding job answering all my questions thoroughly and helping ease my mind that this product was right. This bypass kit saved me roughly 1600 bucks. Thank you Becky and thank you Hewitt Tech for making a product to help fix the issue with or vehicles. I will recommend this product to all of my friends that have this problem!
I called on a Tuesday, had the kit by Friday, installed it in under 2hrs on Sat and avoided a $2,500 plus bill at the dealer who couldn't even make me an appointment until the following week. My 2008 4.7 Tundra runs great now. Thank you for a great product, fast shipping and easy to follow instructions.
Called on Friday and spoke with Paul, the owner, at around noon on Friday (yesterday) afternoon. He was extremely helpful, respectful, and answered all my questions thoroughly. I placed my order with him and my kit arrived the today bright and early in the morning. I am a mechanic, and the install took me about 30 mins. The included directions were crystal clear and very easy to follow. It cleared my P2440 code and promised and my truck is out of "limp" mode. Great product. Great Company. Great customer service. Hewitt Tech will come highly recommended from me. I mean the OWNER of the company took time out his day to give me all the information I needed. There are not many companies out there that take this kind of pride in themselves and their products.
Installed on my 2012 4.7 and it avoided the $2200 quoted by Toyota. It helps if you follow the instructions and don't go rogue. It took me about 2 hours to complete all in. Highly recommend!
Installed on a 2008 Tundra 5.7L. The wiring harness is great quality and easy to install. The block off plates are somewhat difficult the first time around. It found it was way easier to install the plates by loosening the upper air tube bolts. They are not that difficult to get to after locating with a mirror, and using a small socket wrench with universal joint adapters and extensions. The drivers side is easily reached with a long extension from the wheel well. By loosening one and removing one of these bolts, there was plenty of play to slide in the blockoff plates without prying on the manifold. I was able to pull up on the drivers side air from above the engine compartment and have an assistant slide the plate in at the wheel well. The drivers side required pushing on the lower air tube stud (with loosened bolt attached) with a socket and extension to create the gap for the plate. Both methods were much easier than prying on the manifold. I was never able to get enough of a gap and damaged my manifold first time around. Overall, once installed, it works great. Truck runs perfect and no more trouble codes. The customer service is very knowledgeable. They actually returned my calls and emails, and helped with various install questions.
I bought this for my 2008 Tundra 5.7 after I got a P2440 code and the truck went into limp mode. The block off plates were the hardest part of the installation, but it wasn't too bad. Once installed it worked perfect. No check engine light and no limp mode. This product is definitely worth the price.
I bought the kit for my 2008, Tundra, 5.7L after I got the dreaded P2442 code and the truck went into limp mode. I paid for 2-day freight but it arrived the next day anyway. Installation of the block off plates is tricky. Do yourself a favor. Jack up the front end and remove the wheels. You will never be able to do it from the top. It may work this way for the smaller engine options but the 5.7 is really shoehorned in there. My flanges were very tight and required loosening the bolts on the other end of the pipes as well. The electrical part of the install is simply plug-n-play. All that being said, the kit worked perfectly and the truck is running good as new with no CEL. Very thankful to have come across Hewitt. Saved me thousands of dollars. I will definitely come back to them in the future if the need arises.
Amazing product and customer service! This is exactly what I need to avoid giving the dealership $3200 to "fix" Toyota's design flaw. Thank you!
Bought this to fix my 08 tundra that had the p2440 code. Install wasn't terribly difficult and it completely resolved the problem. Saved me thousands of dollars from having to get it fixed at the dealership. Great product. Couldn't be happier.
This is now the third kit I've purchased for my beloved "Yota's". 2 4runners and now my Tundra. Awesome product.
I bought this bypass kit due to having the dreaded P2441 error code on my 2008 Tundra 5.7L. I was looking for options as I did not want to pay the $2500 for a mechanic to fix it. Installed the kit in about an hour. The directions are easy to follow. The block off plates can be a little tricky to install but customer service gave me some advice on installation. The initial bypass kit I received and installed had a firmware/software issue that caused the error code to come back and the CEL to come on. I contacted customer service and they sent me a replacement that has been working flawlessly for the past 6 months.
Had a p0418 code, toyota dealer quoted $2300 to repair. Ordered the kit after talking to a very knowledgeable lady on the phone. Kit came quickly, had my mechanic install for me, charged me 1 hour. No more cel. My 2012 Sequoia 4.6 runs great, no more codes. Thanks Hewitt.
I own a 2012 Toyota Tacoma 4.0L V-6, I purchased it at Carmax in March of 2015 w/24,500 miles on it. The other day the check engine light & Trac light showed up out of nowhere, after taking it to Carmax and being told I had to take it to Toyota (my warranty is good there also). I took it to Toyota and they pretty much told me to go fly a kite because of the very nice Volant Cold Air Filter System I installed on it, the Service Adviser told them to fix it because the Volant System did not cause the failure, but his idiot manager would not fix it. So after telling Toyota to (@#%&(*&%@#^^&&&***), I did find out that ALL TOYOTA OWNERS HAVE A RETROACTIVE 10-YEAR, 150,000 MILE WARRANTY (that came straight from Toyota HQ USA). I came across the video for Hewitt-Tech Inc. SAIS by-pass system it was like the good lord was shining on me. I called and spoke to a very nice woman and ordered the kit for my Tacoma, after receiving the kit, I called Paul Hewitt and I asked him a question which he kindly answered and I could not thank him enough for making this system. It would have taken about 30min. but the connection on the ECT and the rear valve on the secondary system is kind of hard to get to so it took about an hour and a half. But I no longer have to drive around with my Code Scanner plugged in to clear the codes because I don't get them anymore. Paul is the best, I just can't believe it that I came across his system after many hours of googling and reading the horror stories, to every Toyota owner getting the codes that show up, don't even bother with Toyota, because the new replacement part can fail also, just buy this by-pass system and your headaches will be gone.TRUCK RUNS GREAT, THANKS AGAIN PAUL.
I installed this device with a bit of skeptisisim but I was pleasantly supprised. The dealership turned me down on replacing my secondary air injection system saying I had too many miles on my truck to be covered by the warantee. So I looked at this as my only option that was financially available. One thing I have noticed is that it does seem to be a little harder to start after some small trips than it was before. Almost like it needs some gas and is not getting it soon enough. It didnt do that prior to the install of this device. As far as error codes go. All gone and the traction controll is back working now. Toyota now sent me a letter saying they would cover the secondary air injection device up to 150k miles but if you got that letter dont count on it. I took this device back off took my truck to the dealership they then told me it doesnt match the exact code needed to get the free replacement and wanted to charge me $50 for evaluating my truck. I wouldnt pay and brought my truck home and put the device back on. Better to just keep this fix and be happy.It works.
I installed this on a 2012 Tunda 4.6L. Install took an hour, very well made, only a Tundra technician could tell it was there. Worked perfectly!
Installed the bypass quit last week - didn't take any longer than advertised or expected, and no Engine Light since! Great product, very happy customer!
Just installed the bypass kit and the air switching valve bypass on a Toyota Tundra with a 5.7 the product was great a customer service was even better thanks
Works like promised. I first installed it incorrectly, called custumer service and they knew exactly what i had done wrong. Walked me thru it and problem fixed! Took me around 1 hr 45 min w the removal and install of bubus lol
A local Toyata dealership tried several times to fix this secondary air injection valve issue while it was under warranty but the problem kept reoccurring. The secondary air injection values and pumps were supposedly replaced three times but I continued to have all the associated flashing dash lights and codes. They ultimately told me they could not figure out why this was happening. They offered to replace a few electrical components that would not be covered by warranty and said this may or may not fix the problem. So, I said no thanks! I eventually stumbled upon this bypass kit for my tundra, and it was hands down the BEST money I've ever spent on this truck! Extremely fast shipping! Easy to install,and works as advertised! Thank you guys so much!!!!
I ordered this unit for my 2012 Tacoma 4.0L. I called and spoke to customer service to determine the exact kit that I would need and placed my order over the phone. She was very knowledgable and helpful. Everything arrived on time as promised. Installation was a bit of a chore because of the location one of the connections. It's behind the engine, against the firewall. Like another reviewer mentioned, the space to attach the block-off plates is really tight, but there are a few other connections that can be loosened in order to gain better access. In short, no codes after installation. This is a much better option than the $1200 - $2000 fix from the dealer.
Ordered the plug and play bypass kit for my 2008 Toyota Tundra 5.7, very easy to install. Great instructions, easy to follow. Great customer service, fast delivery! In total it only took me 30 minutes to install the bypass kit! Very happy with the results and definitely beats the $4230 the dealership wanted for parts and labor
Ordered for my 2012 Tundra 4.0L V6 but what I received first did not fit my truck. I was dreading having to go back to the dealership and pay ~$3k to fix this problem. I took a couple pictures and contacted customer service and was then express mailed a new harness to fit my truck! After I plugged those in and set up the starter relay I found out my block off plates were too small.
A quick email later I had the larger block off plates priority mailed to me.
I have now installed everything and the CEL has not returned. This coming from a guy who has spent zero time under the hood of a vehicle before this! I just want to thank everyone who helped me and genuinely cared about me being able to fix my truck.
Truly a life saver!
Your Truck had a different setup than we have seen on those in the past. I am glad we were able to get it taken care of for you.
I installed on my 2012 Tacoma Sport 4.0 and it solved the $3000 that haunts these trucks. Easy install in about an hour or so and great service. I sent them some pics that will hopefully help others with the install. I highly recommend.
i installed this product on my 2012 Tacoma 4.0 and it worked flawlessly! The instructions were spot on and I loved the customer service that comes with this company. I would not hesitate to order through this company again. The install took a bit longer for me, almost 2 hours, because I have large hands and had to remove some extra parts to loosen bolts for the block off plates. So far no CEL and no limp mode for my truck!