Buick Encore check engine light on and knocking noise when idling, not yet fixed on Buick Encore

Some Buick Encore owners report experiencing issues when the check engine light is on, often linked to a failing oxygen sensor that requires prompt diagnosis and repair to avoid further complications. Additionally, some owners notice a knocking noise while idling, which may indicate serious engine problems due to ignition or timing issues, or worn lower engine parts, necessitating immediate attention to prevent additional damage. It is recommended to check for trouble codes when the check engine light activates, as specific codes like 0171 can indicate rough idle and wheezing noises. Owners should also be aware that the cost of diagnosing these engine light concerns typically ranges from $88 to $111, making it important to plan for necessary repairs. Consulting a qualified mechanic or dealership is advised to address these warning signs effectively, as neglecting them can lead to more severe and costly issues down the line.