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P0306 is a diagnostic trouble code (DTC) for "Cylinder 6 Misfire Detected". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $79.99. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
Cylinder 6 Misfire Detected
P0306 is an OBD-II generic code that the engine control module (ECM) detected a misfire on cylinder number 6 of the engine.
The spark plug is not firing for cylinder number 6 due to fouling or cracks in the insulation.
The ignition coil for cylinder number 6 has stopped firing due to cracked insulation or open circuit.
The spark plug wire or plug boot is leaking ignition spark to ground for cylinder number 6 from age.
The valve cover is leaking oil into the spark plug holes and shorting the spark plug ignition for the number 6 cylinder.
The cylinder has problems with compression being low from defective rings or valves.
Not switching the coil to a different cylinder to see if the misfire moves to another cylinder. This would indicate a bad coil.
Not switching one part at a time with a different cylinder to isolate the failed part.
Replace the faulty spark plug or replace all spark plugs as a set if failure was due to a worn out plug.
Replace the leaking valve cover gasket then replace the failed coil, plug wires, and plugs.
Replace the ECM for a bad circuit that powers the fuel injector or coil for number 6.
Code P0306 is triggered when the crankshaft sensor does not get an acceleration of the crankshaft from cylinder number 6 firing properly indicating the cylinder is not contributing to the engine power.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230 to have this issue resolved.