A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged.
The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor on Bank #1 is generating a low output voltage (perhaps under 0.5V), then it will trigger a P0327 DTC. This P0327 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0325, P0326, P0328, P0329, P0330, P0331, P0332, P0333, and P0334.
SymptomsYou may notice drivability problems including fluctation engine RPM, a loss of power, and perhaps some hesitation. There may also be other symptoms. CausesPotential causes for a P0327 DTC include (but are not limited to):Trouble code P0327 means:Knock sensor 1 low input
Trouble code P0327 means:Knock sensor 1 low input
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Trouble code P0327 means: Knock sensor #1 circuit low input (Bank 1 or single sensor)
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