THE GR COROLLA P2C90 FIX, FINALLY DIALED. MST PCV KIT.

If you run an aftermarket intake on a 2025 or 2026 GR Corolla, you already know the P2C90 code. Jeff has been living with it on our own car while MST developed a fix, and this is the honest version of that story. Three iterations, a couple of real-world failures, and a production module that has now gone a week and a half and a Watkins Glen trip without a single check engine light. What we cover: What the P2C90 code actually is, and why 2025 and 2026 cars are so sensitive to it The MST V2 intake update: noise, filter cover on vs off, and how it held up on a track day The full development story of the PCV Error Fix Kit, from the first standalone module to the production version Why the first two versions threw a low-power warning and then a CEL in our climate How the new module works: powered off the PCV sensor plugs, with a button for manual level 4 or 5, or a learning mode that reads your car and matches it Real-world results after a week and a half of mixed driving, eco mode, and a highway run to the track Links: Watch the intake install and P2C90 walkthrough: [PREVIOUS VIDEO URL] Read the full breakdown on the blog: [BLOG URL] Shop the MST PCV Error Fix Kit: https://www.rallysportdirect.com/prod... Shop the MST V2 intake: https://www.rallysportdirect.com/prod... Got a car you want us to build parts for, or a question about how something works? Drop it in the comments. RSD. Built by Enthusiasts. Driven by Experience.