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CAI throws P0402??

Ram4500tow said:
Contact banks they have fix coming out soon. I just spoke with them today
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I just threw the same code yesterday after installing my banks CAI... keep us posted
 
I put the boost tubes on my truck and now I got p2002 code but I think it might be because one of the tubes like always for me blew off the other day and I had to limp her home.
 
I also just threw code P0402 on my '22 while towing about 7k lbs. Cleared the engine light with a scanner, engine came back 50 miles later. Its since turned off on its own after a couple days (pulling our travel trailer ID-MT-WY-CO-ID) I have a Banks ram air but that's it. It does sound like the valve may be be cracked because there is a slight low hiss coming from the EGR that I don't remember hearing before. Also my mileage seems pretty inconsistent. Sometimes it's terrible and other times it seems far better. Will let you guys know what the dealer says.
 
jayboy918 said:
I also just threw code P0402 on my '22 while towing about 7k lbs. Cleared the engine light with a scanner, engine came back 50 miles later. Its since turned off on its own after a couple days (pulling our travel trailer ID-MT-WY-CO-ID) I have a Banks ram air but that's it. It does sound like the valve may be be cracked because there is a slight low hiss coming from the EGR that I don't remember hearing before. Also my mileage seems pretty inconsistent. Sometimes it's terrible and other times it seems far better. Will let you guys know what the dealer says.
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Put the factory air box it will go away. The ecm is seeing To much fresh air because of the banks intake. I took mines off till they come up with a solution.
 
Checking in on this installed the Banks CAI 3 weeks ago, got the P0402 this morning, not change in performance, just the check engine light. Has anyone seen anything from Banks addressing this? i still have to boost tubes and intake elbow to put on, kind of hope this isn't an issue I'm creating for myself - TIA!
 
NVBM65 said:
Checking in on this installed the Banks CAI 3 weeks ago, got the P0402 this morning, not change in performance, just the check engine light. Has anyone seen anything from Banks addressing this? i still have to boost tubes and intake elbow to put on, kind of hope this isn't an issue I'm creating for myself - TIA!
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They do not have a fix at this point. I returned mine for a complete refund .
 
As of 10-11-23 there is still not fix in place per Banks. They claim they are working on one that could be a redesigned tube from the turbo to the filter box, but it sounds like nothing anytime soon. They also claim there should be no impact to the engine. Guess I'll confirm that with the dealer when it goes in for recall work next week.
 
I just bought a Banks CAI for my MY23 Rebel 6.7. Do you all get the code all of the time or just under load at high boost? Is it perhaps a change on the late model year (MY22+) Ram's with the Cummins?

Banks had an interesting dilemma on their CAI for the current gen L5P Duramax in that they created more air going past the MAF and not surprisingly, I am sure, it was throwing a code. So what they did to solve that was create a patented Air Mass Control Module that went between the MAF on the CAI and your engine. I suspect it fools the ECU just enough to where it all works. I'm disappointed to hear this on the 6.7 Cummins, this thing isn't exactly new. After watching the video on Banks CAI versus the S&B, I wouldn't want any other CAI on my truck.

 
Also, on a side note, Hardaway Performance out of Florida just posted about a week ago now that they can unlock your ECU with HP Tuners and tune up to a MY24 Ram Cummins, so hopefully if it's just a lean issue with the Banks CAI they can get that sorted out sooner rather than later. Usually, motors are set from the factory very rich and that is why a CAI usually doesn't throw a code saying it's too lean when installed.

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I just called Banks and spoke with their tech support. It's not a lean code, so your AFM is not being leaned out by the CAI. Remember the P0402 code is for EGR excessive flow which is crazy because the EGR is on the other side of the engine on top of the intake manifold, after the air has gone through the CAI, the turbo, and the intercooler. Banks told me that it doesn't happen to every vehicle and all the ones that come into their shop for install, (which usually get the whole package including CAI, Monster Ram Air intake, and boost pipes,) aren't tripping the code, so they are still working on why some get it and some don't.
 
AirRyan said:
I just called Banks and spoke with their tech support. It's not a lean code, so your AFM is not being leaned out by the CAI. Remember the P0402 code is for EGR excessive flow which is crazy because the EGR is on the other side of the engine on top of the intake manifold, after the air has gone through the CAI, the turbo, and the intercooler. Banks told me that it doesn't happen to every vehicle and all the ones that come into their shop for install, (which usually get the whole package including CAI, Monster Ram Air intake, and boost pipes,) aren't tripping the code, so they are still working on why some get it and some don't.
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My son and I both 2022s. Both do it but there's no rhyme or reason, last time it set the code we pulled our airstream over the pass into Vegas and out the other pass in 99 degrees, no code, got up to Mesquite for lunch, code set off on the on ramp. No sense at all. The Banks person I talked to put our names on a "list" for when they get a fix, hope they get around to it fairly soon....
 
AirRyan said:
I just bought a Banks CAI for my MY23 Rebel 6.7. Do you all get the code all of the time or just under load at high boost? Is it perhaps a change on the late model year (MY22+) Ram's with the Cummins?

Banks had an interesting dilemma on their CAI for the current gen L5P Duramax in that they created more air going past the MAF and not surprisingly, I am sure, it was throwing a code. So what they did to solve that was create a patented Air Mass Control Module that went between the MAF on the CAI and your engine. I suspect it fools the ECU just enough to where it all works. I'm disappointed to hear this on the 6.7 Cummins, this thing isn't exactly new. After watching the video on Banks CAI versus the S&B, I wouldn't want any other CAI on my truck.

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Mine has only gotten the code twice and it's while pulling (~6500lbs) and after stopping at an intersection then accelerating to highway speeds. Not a ton of boost pressure, I've seen more pressure going up some of the hills/mountains in Idaho, though I'm not sure the boost pressure has anything to do with it, but it's only been under moderate acceleration.
 
With these modern trucks they are looking for a specific amount of boost at all rpms/load, so you can be over-boosted at 10 psi if the ECM thinks you should only have 5 psi. It's not about peak boost anymore, it's about a specific amount of boost at any given time. The 6.7L with stock tuning has always been sensitive to CAI's.
 
AH64ID said:
With these modern trucks they are looking for a specific amount of boost at all rpms/load, so you can be over-boosted at 10 psi if the ECM thinks you should only have 5 psi. It's not about peak boost anymore, it's about a specific amount of boost at any given time. The 6.7L with stock tuning has always been sensitive to CAI's.
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Spot on! It's all about flow and not peak boost numbers. As stated above if the ECU detects to much air flow or to little air flow it throws a fault code. There are a handful of members on here that run the S&B and they do not throw codes. I am guessing the Banks is allowing a little to much air in resulting in a code. THis has been a known issue with Banks ever since they introduced the CAI for the 19+ trucks. The fact they do not have a solution would be concerning to me as a buyer. Is anyone with a tuned 19+ truck running a Banks CAI? If so are you throwing any check engine lights?? I am assuming with tuning you will not have any issues but its very expensive especially for the 22+ trucks (over 4k!!).
 
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