What are the symptoms of a faulty knock sensor in a car?
2 Answers
Knock sensor failure can lead to reduced engine power, knocking sounds from the engine, and potential damage to engine pistons and cylinders. It also prevents detection of engine detonation signals and automatic retardation of ignition timing. Here's some information about knock sensors: 1. Introduction: It's a sensor that detects engine detonation. When engine detonation occurs causing vibrations, the knock sensor receives pulse signals and feeds them back to the engine ECU, which then reduces the ignition advance angle to prevent detonation. 2. Notes: When the knock sensor is functioning properly, the engine control unit will reduce the ignition advance angle upon detecting detonation through the sensor, thereby preventing severe detonation.
My car's knock sensor is broken, and I've encountered this issue several times while driving. The engine malfunction indicator light stays on, very noticeable on the dashboard. When accelerating, the car feels sluggish, struggles when climbing hills, and often shakes during startup. Sometimes I can hear frightening 'knocking' sounds from the engine. Fuel consumption has also increased dramatically - previously a full tank could last 500 km, but now it's down to 400 km, requiring more frequent refueling. If left unrepaired, it may cause internal engine damage such as piston or valve problems, leading to even more expensive repairs. I recommend having mechanics check the sensor during regular maintenance and replacing it immediately if any abnormality is found. Delaying repairs not only costs more money but also compromises driving safety, especially when sudden power loss occurs on highways which could easily lead to accidents.
