* Faulty spark plugs or spark plug wires: If the spark plugs are worn out or damaged, they can cause misfires, which can lead to error codes P0305 and P0205. Similarly, if the spark plug wires are damaged or loose, they can also cause misfires.
* Faulty ignition coil: The ignition coil is responsible for providing the spark plugs with the high-voltage electricity they need to ignite the air/fuel mixture. If the ignition coil is faulty, it can cause misfires, which can lead to error codes P0305 and P0205.
* Vacuum leak: A vacuum leak can cause the engine to run lean, which can lead to misfires. This can cause error codes P0305 and P0205.
* Faulty fuel injector: If a fuel injector is faulty, it can cause the engine to run lean, which can lead to misfires. This can cause error codes P0305 and P0205.
* Clogged catalytic converter: A clogged catalytic converter can cause the engine to run rich, which can lead to misfires. This can cause error codes P0305 and P0205.
* Engine compression problems: Low engine compression can cause misfires, which can lead to error codes P0305 and P0205.
Other possible causes:
* Faulty oxygen sensor: A faulty oxygen sensor can cause the engine to run rich or lean, which can lead to misfires. This can cause error codes P0305 and P0205.
* Faulty mass air flow (MAF) sensor: A faulty MAF sensor can cause the engine to run rich or lean, which can lead to misfires. This can cause error codes P0305 and P0205.
* Faulty throttle position sensor (TPS): A faulty TPS can cause the engine to run rich or lean, which can lead to misfires. This can cause error codes P0305 and P0205.
