DTC P0327 - KNOCK SENSOR LOW VOLTAGE Oldsmobile Cutlass VI

Note. For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .

Circuit Description

Knock Sensor (KS) is used to detect engine detonation (knock). If excessive knock is present, PCM will retard timing until knock goes away. When KS module in PCM determines that an abnormally high noise channel voltage exists, PCM will set DTC P0327.

Conditions required to set DTC are

1. No CKP, ECT or TP sensor DTCs set.
2. No IC control, or VSS DTCs set.
3. Engine running at least 10 seconds.
4. ECT greater than 149°F (65°C).
5. TP angle greater than 1.5 percent.
6. Engine speed is 2500-2900 RPM.
7. System voltage is greater than 9 volts.
8. Difference between KS minimum learned noise and noise channel is less than 0.4 volt.