check engine light
Postmaster
Joined: Jun 2009
Posts: 2,566
Likes: 1
From: Monroe/Ellensburg, WA
Do you have your exhaust back pressure valve unplugged? That would be my guess for that code. The 1211 means your either you have a bad ICP sensor or your HPOP was losing pressure pretty fast during a WOT run. I would guess the boost malfunction was from your split boost line? The low voltage one means you should start checking your battery connections and grounds. Maybe clean your battery terminals.
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