Faulty Mass Air Flow Sensor: When exposed to dirty or particle-rich air, the Mass Air Flow (MAF) sensor could fail. An engine with too little fuel is at risk of total engine failure, and an engine with too much fuel will create excessive smoke and odor. A faulty oxygen sensor can cause your vehicle's computer to supply the engine with too much or too little fuel. The oxygen sensor provides vital air-fuel mixture information to the ECU. Faulty Oxygen Sensor: Due to long exposure to hot exhaust gas, your oxygen sensor might need replacing. Faulty spark plugs or spark plug wires can cause your engine to misfire, reducing fuel economy, performance, and even prevent it from running altogether. Your spark plugs create a hot spark that ignites the air-and-fuel mixture in the cylinder, allowing your engine to start and run. Fouled Spark Plugs or Spark Plug Wires: Over time you will eventually need new spark plugs or spark plug wires. A failing or clogged catalytic converter can severely impact fuel economy and vehicle performance. The catalytic converter is a vital part of the emissions system, removing toxic carbon monoxide. Failing Catalytic Converter: Your catalytic converter can eventually clog with material, especially with higher mileage vehicles. Gas cap issues can reduce fuel pressure and allow fuel vapors to escape, reducing fuel economy and increasing harmful emissions. Loose Gas Cap: Your gas cap is loose, broken, or simply missing. 
Below we have highlighted the most common causes of a check engine light. Fortunately AutoNation Nissan Memphis is here to help you figure out what might be wrong, and what your next steps should be. A wide array of issues can cause a check engine light to come on, some more serious than others. Has the check engine light turned on in your Nissan Altima, Versa, Rogue, Pathfinder, or Frontier? It can be alarming seeing an engine warning appear on your dashboard, especially if you've never seen it before.
Schedule Service Appointment Common Causes For Nissan Check Engine Light
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