Generic
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Knock Sensor 1 Circuit Low

GM
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Knock Sensor Circuit Conditions
Cause:
    No CKP, ECT, MAF, TP or VSS codes set, system voltage 10-18v, engine speed 1000-5000 rpm, ECT input more than 153°F, throttle position from 10-15%, engine load over 45%, maximum spark retard less than 15°, and the PCM detected a Knock sensor signal that was within a calculated average voltage range for 10 seconds

Nissan
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Knock sensor (KS) - voltage low
Cause:
    Wiring, KS, ECM