Got the Check Engine Light and code P0021? This video explains what causes intake camshaft timing issues, how to recognize the symptoms, and what you can do to fix it. Learn how a bad VVT solenoid, dirty oil, or timing chain problems could be affecting your engine's performance. Whether you’re a DIY mechanic or just want to understand your vehicle better, this guide will walk you through everything you need to know. You might be looking for: P0021 intake camshaft timing over advanced Symptoms of a bad VVT solenoid How to fix P0021 Engine rattle and Check Engine Light Camshaft timing problems