DTC P0327 Or DTC P0328: Condition
WARNING: This page is about a different car, the 2002 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0327 is set when ECM detects that Knock Sensor (KS) output voltage is .9 volts or less.
DTC P0328 is set when ECM detects that KS output voltage is 3.98 volts or more. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.