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I had the same code on my car, but for bank 2 (p0330). P0325 and 330 are electrical type codes, and I don’t believe will be set by excessive KR. It’s something that a poor connection, damaged wires, or a bad knock sensor could trigger though.
On my car, I ended up replacing the knock sensor. It was something stupid like $10. Kind of tight to get to, but not too bad compared to the German cars I work on for a living. At first I was worried some of the wiring got melted by the headers, but everything checked out fine. I replaced the sensor and it hasn’t come back. I also wrapped the wires in some heat wrap, but I don’t think that was an issue as the bank 2 sensor is behind the starter heat shield.
That said, the bank 1 knock sensor wiring could be touching your header. Mine was, and I’m usually super thorough when I do my installs. Thankfully, that wiring is wrapped in some silver heat wrap, but I could see it being an issue long term. I just adjusted where it was sitting to create some space. I’d definitely check this on your car.
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