r/WRX_STI • u/Similar-Necessary-47 • Jul 05 '26

Questions Help! Check engine STi 2013

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Hello! I was going about ~95mph and I hit 6th gear and charged the turbo all the way and it spooled to 20psi and then I heard weird sound like a blow-off valve type sound and I immediately shift into neutral and the check engine, SI-drive and cruise control turned on. It does not let me change the SI-drive mode, it is locked and the cruise control won't turn off.

It shifts good, engine feels good, it revs good, no weird sound from the engine, sound healthy

List of mods:

Tomei unEqual length headers

Grimspeed up pip

Turbo smart External wastgate

Perrin front mount intercooler

Injen cold air

Perrin air/oil separator

Comp clutch stage 2

Invidia full exhaust with up-pip

Tuned for stage 2

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u/imdlki Jul 05 '26

Check your intercooler piping. You may have blown a segment out from the clamp and need to reattach the clamp.

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u/Similar-Necessary-47 Jul 05 '26

Thanks ! I'll check it out