A malfunctioning knock sensor prevents the engine control unit (ECU) from optimally adjusting ignition timing. This can lead to pre-detonation (knocking), potentially causing damage ranging from reduced fuel efficiency and increased emissions to severe engine damage like cracked pistons or damaged bearings. Ignoring a faulty sensor can lead to expensive repairs.
Maintaining proper engine function is crucial for vehicle longevity and performance. Historically, knock sensors emerged as a key component in enabling higher compression ratios for improved power and efficiency while safeguarding against the detrimental effects of detonation. Their ongoing functionality ensures the engine operates within safe parameters, protecting critical components from damage.