Knock Sensor: Description and Operation

1987 Dodge Shadow L4-135 2.2L SOHC TurboSECTION Description and Operation

The detonation sensor generates a signal when spark knock occurs. It is mounted on the intake manifold in a position where detonation in each cylinder can be detected. The logic module or SMEC uses information from the knock sensor to modify spark advance and boost schedules to eliminate detonation.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.