P0306 Cylinder 6 Misfire Detected Intake Plenum Gasket Issue Ford F150 2015-2020 diagnosing, fixing.

“In this video, I explain how I diagnosed and fixed the P0306 - Cylinder 6 Misfire Detected error on a Ford F-150 (2015–2020).

The issue was caused by a leaking intake plenum gasket. I take you step-by-step through the diagnostic process, starting with a road test and live scan tool monitoring, which revealed erratic short- and long-term fuel trim values. After visually inspecting the air intake system and finding no external issues, I connected a smoke machine to the intake manifold to check for leaks. The test showed smoke escaping from the intake plenum gasket, confirming the gasket was faulty.

I replaced the intake plenum gasket with a new one, cleared the error codes, and performed a road test to verify the repair. The vehicle operated smoothly, the check engine light stayed off, and no fault codes returned.

This video provides a clear and detailed guide to diagnosing and fixing a P0306 Cylinder 6 Misfire caused by an intake plenum gasket issue. If you’re dealing with similar symptoms, this video will help you find and resolve the problem efficiently.”