how many knock sensors does a 2009 Toyota Corolla have?
Knock sensor is to prevent detonation with using lower octane fuel than required or you have excessive carbon build up in the intake. The 'knocking' sounds more like marbles or valve tapping under light or heavy acceleration.
I was wondering How many? as in 1, or 2 or more Knock sensors on a 2009 Toyota Corolla. The answer above does not help me :(
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