NOPE. 2025 6MT.

TSB followed, and I still throw the CEL with the MST intake V1. The only difference I noticed is that the intake no longer flutters after the update LMAO.

I also just saw a Reddit post that someone with the SXTH intake got the 2025 update and reinstalled their intake and it’s still throwing the CEL.

So 2 votes for it not working so far.

 

We (SXTH) have had a few reports of it not working now. One confirmed that it is still happening with stock intake as well.

 

I spoke with a local service department. They refused to do the flash without the code being present. For those who have done it, did you have the code present or a history of it?

 

Makes sense. When I first got the code, the dealer would not diagnose the car since no codes were present and the car was drivable

Have you had the dtc on your car previously on record with that dealer?

 

Hello. 25 GRC 6MT all stock. I’ve had the code stock and with an intake. I’ve been working closely with K&N to see if they can find a bypass for the CEL. No luck. Now that I’ve had the update, I’m going back next week to start again. Will update later.

 

Hello so I will post this info here since there are a few different threads talking about the TSB software update and the P2C9000. I have the HKS intake with full enclosure installed. Prior to the TSB I would get the code to easily pop going over 4k rpm. I added the SXTH FIX hose knowing they have it listed with not fixing the CEL issue. This hose fix was the only one that would hold off the code from coming back very quickly. I could go multiple days before it would come back. I even tried the MST V2 hose layout; which was worse. On my way to the dealer for the TSB software my CEL came back on. Installed software no problem. They cleared the code and then I drove the car hard all day Saturday Oct 4 2025. Let the car cool down between trips and did same thing. Driving aggressive and revving the engine over 5k. Did the same thing Sunday Oct 5 2025, again no issues. Monday a member on here asked me to take off the SXTH hose. So I did that and put the hose back to how the HKS intake install shows. On my second trip that day the CEL popped with P2C9000 very quickly again just like before the update. I then swapped back on the SXTH FIX hose and cleared codes. The CEL has been off since putting it back on.

To summarize:

25MY manual, TSB update, HKS intake with enclosure kit, & SXTH FIX hose installed.

This combination has kept the P2C9000 code from popping and allowing me to finally drive the car as intended.

 

Just want to add my VIN falls before the production change timeline, it’s a 2025 I bought the first week of January 2025. My last VIN numbers are 16193.

Currently sitting at 16,696 miles and have not had the code yet.

 

DOES NOT WORK 2025 grc 8 speed auto SXTH INTAKE installed tsb and reinstalled my intake after a couple of miles still comes on as it did in the past I also reached out to the company that made the intake they are still testing

 

It appears Toyota has lowered the alarm threshold with this update, but hardly enough to prevent it from triggering with the stock intake. We'll have to wait until tuners figure this out and completely fix the issue. It's only a matter of time.

 

I have seen several reports of cars still throwing P2C90 with stock intake after the update. Seems like something isn’t quite right.