TSP catted downpipe issue

[lando]

Just had the TSP catted downpipe installed on my 2025 type r. For the first 50 miles the car ran great. The car was running fine, and after the 4th start, leaving the store, I got the dreaded check engine light and emissions message. Car still drove pretty normal. Message on dash said to avoid heavy acceleration. Everything looks like its tight on the install. I know these downpipes are not suppose to cause a CEL. Anyone run into this problem on a TSP catted dp?

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[getRIGHT]

Did you scan the CEL? What code did you get?

 

[lando]

Did you scan the CEL? What code did you get?

P0046 actuator code
I check the connection on it, and it moved a tiny bit. I cleared the code and then I got two more random codes P0027 and U25E5. Drove the car and it wouldnt build any boost. Pulled in my garage and the cel light went off. Cleared all codes again and boom everything went back to normal. Builds boost and pulls strong. So im just confused on what happened.

 

[Higgs Boson]

high flow cats sometimes don't cause CEL's, in my experience they always do, doesn't matter if it was a honda or a porsche. I just go catless if I make a change at all, which by in large I have outgrown/gotten too old to bother.

Get a tune and have the emissions codes related to the cat turned off.

 

[Two Step Performance]

P0046 actuator code
I check the connection on it, and it moved a tiny bit. I cleared the code and then I got two more random codes P0027 and U25E5. Drove the car and it wouldnt build any boost. Pulled in my garage and the cel light went off. Cleared all codes again and boom everything went back to normal. Builds boost and pulls strong. So im just confused on what happened.

As you may have already learned, P0046 does not have any relation to the downpipe or the emissions system.

It is associated with the electronic wastegate actuator on the turbocharger. If you are lucky you may can erase the code and never see it again. Otherwise you will end up calibrating the actuator, replacing it, or worse case scenario - also replacing the turbo.

 

[Cueyo]

As you may have already learned, P0046 does not have any relation to the downpipe or the emissions system.

It is associated with the electronic wastegate actuator on the turbocharger. If you are lucky you may can erase the code and never see it again. Otherwise you will end up calibrating the actuator, replacing it, or worse case scenario - also replacing the turbo.

Could this caused by install error? I feel like I hear a lot about people getting codes after downpipes that aren't emissions related

 

[lando]

As you may have already learned, P0046 does not have any relation to the downpipe or the emissions system.

It is associated with the electronic wastegate actuator on the turbocharger. If you are lucky you may can erase the code and never see it again. Otherwise you will end up calibrating the actuator, replacing it, or worse case scenario - also replacing the turbo.

So far erasing the code fixed the issue, fingers crossed it stays that way. Thank you for your response. I looked over the wiring, and made sure the plug was connected snug. Was able to push the connector in a bit, so maybe it was just a tad loose. If the actuator has to be calibrated, is that something the dealer will have to do, or a tuner?

 

[lando]

If the code comes back, then i'll calibrate the actuator. It seems pretty straight forward. Has anyone done this before, and if so any tips before attempting this.

 

[Two Step Performance]

Could this caused by install error? I feel like I hear a lot about people getting codes after downpipes that aren't emissions related

I'd say no probably not. In theory you should not have to touch the wastegate actuator during a downpipe install. However, it is somewhat in the area of where you are working, and if someone was bump it, drop a tool on it, etc - this could lead to an actuator issue. It is a very sensitive part we have learned.

So far erasing the code fixed the issue, fingers crossed it stays that way. Thank you for your response. I looked over the wiring, and made sure the plug was connected snug. Was able to push the connector in a bit, so maybe it was just a tad loose. If the actuator has to be calibrated, is that something the dealer will have to do, or a tuner?

Hopefully you will not be greeted by a P0046 again! Honda's official position is that they will not calibrate the actuator - there is no "official" procedure to do so. They instead recommend replacing the full turbocharger assembly. However, this task is commonly required during a turbo upgrade and over time we have learned how to complete this task. The guide I typically recommend for this process was posted by Full Race:

https://www.full-race.com/resources/electronic-wastegate-calibration-ctr

They outline two methods. Personally I prefer to use a multimeter and not rely on Hondata for the calibration data.

 

[lando]

I'd say no probably not. In theory you should not have to touch the wastegate actuator during a downpipe install. However, it is somewhat in the area of where you are working, and if someone was bump it, drop a tool on it, etc - this could lead to an actuator issue. It is a very sensitive part we have learned.


Hopefully you will not be greeted by a P0046 again! Honda's official position is that they will not calibrate the actuator - there is no "official" procedure to do so. They instead recommend replacing the full turbocharger assembly. However, this task is commonly required during a turbo upgrade and over time we have learned how to complete this task. The guide I typically recommend for this process was posted by Full Race:

https://www.full-race.com/resources/electronic-wastegate-calibration-ctr

They outline two methods. Personally I prefer to use a multimeter and not rely on Hondata for the calibration data.

Thank you for the info! Hopefully I won't even have to mess with it. Knowing my luck though.... I probably will lol

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