1. Your engine isn’t running well: The signal from this sensor is required to operate the fuel injectors, as well as most timing-based engine functions, like spark control. Because of this, a faulty sensor can easily cause a misfire, poor acceleration or other problems.

Diagnostic Trouble Code P0300 can set if you have faulty spark plugs, low compression, damage or excessive wear of spark plug wires and/or coils, faulty fuel injectors, clogged EGR valves or tubes, burned valves, improper ignition timing, vacuum leaks, leaking head gasket, faulty camshaft sensor, faulty crankshaft …

Single cylinder misfire can cause an oxygen sensor code, due to excess oxygen being present in the exhaust manifold, and adding fuel does not change the “lean” condition. Always fix the misfire first. Modern engines will turn off the fuel injector on a misfiring cylinder to protect the catalyst.

Answer: If the faulty cam sensor has a bad effect on ignition timing (at least in some models), it can lead to a misfire; enough raw fuel will cause the catalytic to get red hot.

Bad spark plugs can cause your engine to misfire. The engine’s computer uses sensors to detect these misfires and will create a code that turns on the check engine light. A flashing check engine light indicates the misfire is severe enough to cause damage to your catalytic converter.

The PCM can detect when a cylinder decelerates (an indication of a misfire), store a Diagnostic Trouble Code (DTC) in memory, and turn on the Check Engine Light. Some car computers detect misfires by measuring electrical activity [ionization] at the spark plug electrodes.

An engine misfire can be caused by bad spark plugs or imbalanced air/fuel mixture. Driving with a misfire isn’t safe and can damage your engine.