Hondata

I have a 2017 Civic Sport Touring, I have been running the 6psi and 3psi EPA/Carb tunes all summer through fall no problem. I returned the car to stock and it in for service.I have since re-tune it to 6psi and after about 200 km. I saw all the dashboardlights came on, I then uploaded the 3psi tune and same thing happened after 5 km. so I checked for error code which revealed the code P0299. I have since returned the ECU back to stock.

Has anybody experienced this? I would appreciatesome advice please.

Did you do anything with the intake or charge pipes? P0299 means the actual boost is less than the target boost, so usually means either a leak or the ECU is targeting too much boost. If you're back to stock then it should not be the latter.