S15/T15 Sonoma P/U 2WD L4-2.2L VIN 5 Flex Fuel (2001)
Knock Sensor: Description and Operation
Purpose
To control spark knock (detonation), a Knock Sensor (KS) system is used. This system is designed to retard spark timing when excessive spark knock is
detected in the engine. The KS system allows the engine to use maximum spark advance for optimal driveability and fuel economy under all operating
conditions.
