Hyundai Santa Fe: Engine Control System / Knock Sensor (KS). Description and operation

Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking.

When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. When a knock occurs, the sensor produces voltage signal. The ECM retards the ignition timing when knocking occurs. If the knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This sequential control can improve engine power, torque and fuel economy.

Camshaft Position Sensor (CMPS). Repair procedures

Inspection 1. Check the signal waveform of the CMPS and CKPS using the diagnostic tool. Specification : Refer to "DTC Diagnostic Guide" Removal    • DON’T remove the camshaft position sensor during engine running or right after engine stops, or a scald by the flowed out engine oil may occur...

Knock Sensor (KS). Specifications

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Other information:

Hyundai Santa Fe (TM) 2019-2025 Service Manual: General Service Information

General Service Information Protection of the Vehicle Always be sure to cover fenders, seats, and floor areas prior to beginning work.    • The support rod must be inserted into the hole near the edge of the hood whenever you inspect the engine compartment to prevent the hood from falling and causing possible injury...

Hyundai Santa Fe (TM) 2019-2025 Owner's Manual: Seat belt safety precautions

Always fasten your seat belt and make sure all passengers have fastened their seat belts before starting any trip. Air bags are designed to supplement the seat belt as an additional safety device, but they are not a substitute. Most states require all occupants of a vehicle to wear seat belts...