Wells

SU378

Wells SU378 Ignition Knock/Detonation Sensor

EAN: 0025889173683

UPC: 025889173683

SKU: WEL SU378

Detonation

Designed and tested to meet or exceed OE specifications for form, fit, and function
See service manual for proper diagnosis and replacement procedures
After component replacement, use a scan tool to clear any trouble codes (P-codes) or turn off the Check Engine Light (CEL), Service Engine Soon (SES), or Malfunction Indicator Lamp (MIL)
If trouble codes (P-codes) are cleared with a scan tool, certain Engine Control Module (ECM) settings may need to be relearned by driving the vehicle before emission testing
When replacing electrical components, check connectors for corrosion or breakage and repair or replace as necessary

Wells Vehicle Electronics' Ignition Knock (Detonation) Sensors are designed and manufactured to meet or exceed original equipment manufacturers' specifications for performance and durability. The Ignition Knock (Detonation) Sensor, also known as the Knock Sensor or KS, "listens" for certain harmonic frequencies associated with engine knock or "ping" and sends a voltage signal to the Engine Control Module (ECM) when detected. The ECM calculates proper ignition spark timing based in part on the Ignition Knock (Detonation) Sensor's signal. A malfunctioning or inoperative Ignition Knock (Detonation) Sensor can allow engine knock or "ping" to occur for which the ECM would otherwise adjust ignition timing to eliminate. It can also cause the Check Engine Light (CEL), Service Engine Soon (SES), or Malfunction Indicator Lamp (MIL) to illuminate and can set a trouble code (P-code) in the ECM when not functioning correctly. Not correcting a failed Ignition Knock (Detonation) Sensor condition can cause reduced fuel mileage and performance under load, increased emissions, and damage to other components. Prolonged engine knock can cause internal engine damage from the piston skirt "slapping" against the cylinder wall.

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