my ecu is putting out code 12 (EGR) and code 23 (knock sensor)...i don't even know where my knock sensor is located..any help in finding it/fixing the problem?
I have a JDM F22B engine and it doesn't have an air boost valve like the H23A1 or H22A1 engines.
1. Is it supposed to have one?
2. If no, then would there be any advantage to putting one in?
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