Wells 5S2221 Ignition Knock Detonation Sensor

The Wells 5S2221 Ignition Knock (Detonation) Sensor, also known as a knock sensor (KS), monitors harmonic frequencies associated with engine knock or "ping" and transmits voltage signals to the Engine Control Module (ECM) when detected. The ECM uses this data to calculate proper ignition spark timing, helping to prevent engine damage and maintain optimal performance.

Key Features:

• Designed and manufactured to meet or exceed OEM specifications for performance and durability
• Detects preignition when air/fuel mixture ignites before spark plug fires
• Enables ECM to adjust ignition timing and injection pulse width
• Direct-fit replacement sensor for specific vehicle applications
• Quality-tested to ensure reliable operation

A malfunctioning knock sensor can allow damaging engine knock to occur and may trigger the Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) with diagnostic trouble codes. Ignoring a failed sensor can result in reduced fuel economy, poor performance under load, increased emissions, and potential damage to other engine components. Wells Vehicle Electronics provides reliable replacement sensors backed by decades of automotive electronics expertise.