Can leaky flex pipe cause check engine light to come on?

Yes, a leaky flex pipe can cause the check engine light to illuminate. The leak may lead to an improper air-fuel mixture or affect the exhaust system's pressure, triggering oxygen sensor or catalytic converter error codes. Additionally, the vehicle's onboard diagnostics system detects changes in exhaust flow or emissions, which can also activate the check engine light. It's important to address any exhaust leaks promptly to prevent further damage and ensure optimal vehicle performance.