Sponsored

P0299 - turbocharger underboost problem

BuntaTypeR

Senior Member
Joined
Jan 19, 2024
Threads
18
Messages
278
Reaction score
383
Location
USA
Vehicle(s)
2024 Civic Type R, Tesla M3P, 08STi, S2k,Rsx-S
I went to the track yesterday and got an error code on my Type R. I didn’t have any issues in the morning but i felt the low power output. However, in the afternoon the problem started showing up.

We were able to clear the code, but when I went back out for another run, it came back on the third lap. We cleared it again afterward.

Have you ever seen this issue before? The code is P0299 – Turbocharger Underboost. Just wondering what you think might be causing it.

11th Gen Honda Civic P0299 - turbocharger underboost problem 20260905_145535


11th Gen Honda Civic P0299 - turbocharger underboost problem 20260905_065613


11th Gen Honda Civic P0299 - turbocharger underboost problem 20260905_155044


11th Gen Honda Civic P0299 - turbocharger underboost problem 20260905_141423
 

Websitesdown

Senior Member
Joined
Jun 17, 2024
Threads
5
Messages
415
Reaction score
324
I went to the track yesterday and got an error code on my Type R. I didn’t have any issues in the morning but i felt the low power output. However, in the afternoon the problem started showing up.

We were able to clear the code, but when I went back out for another run, it came back on the third lap. We cleared it again afterward.

Have you ever seen this issue before? The code is P0299 – Turbocharger Underboost. Just wondering what you think might be causing it.

20260905_145535.webp


20260905_065613.webp


20260905_155044.webp


20260905_141423.webp

Sounds like you have a leak. Hose clamp or bolts have worked loose is my first assumption. Go over everything and find it.
 

Chilly613

Senior Member
Joined
Nov 5, 2022
Threads
13
Messages
1,134
Reaction score
1,410
Location
Southern California
Vehicle(s)
2025 FL5 Civic Type R
Build Thread
Link
That looks like a DIY duct to bring in cooler air, not a fog light.

To the OP, like others have said, you may have a leak or it could be an issue with the wastegate.
Sponsored

 
Last edited:
 







Top