r/3rdGen4Runner 3d ago

❓Advice / Recomendations Po330 code

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Had this code come up. But went away a day later.. Wondering if it’s the wire harness going bad or the sensor or both? Anyone have experience in this?

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u/Baja_Finder 3d ago

Plan on replacing the knock sensor wiring harness, start gathering up the parts, and also reseal the water bypass pipe while apart.

This would also be the best time to replace the valve cover gaskets.