Kia Optima engine knocking issue after oil change and crankshaft sensor replacement on Kia Optima

Some Kia Optima owners report experiencing engine knocking after an oil change and crankshaft sensor replacement, which may be attributed to several factors. A faulty knock sensor can fail to detect knocking properly, potentially leading to engine damage. Additionally, low oil levels are a common cause of engine knocking, making it essential for owners to ensure adequate oil in the engine. Ignition issues and incorrect timing settings can also contribute to this problem, necessitating a thorough check of the ignition system and timing. Furthermore, issues with rod bearings and bad spark plugs are known to cause engine knocking, highlighting the importance of inspecting these components. If the knocking persists after addressing these areas, consulting a mechanic or dealership for a comprehensive diagnosis and repair is recommended.