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Does fuel injectors cause check engine light to come on?

Yes, faulty fuel injectors can definitely cause the check engine light to come on. Here's why:

* Fuel/Air Mixture Issues: Fuel injectors are responsible for delivering the precise amount of fuel to the engine's cylinders. If an injector is clogged, leaking, or not delivering the correct amount of fuel, it can disrupt the fuel/air mixture. This leads to problems with combustion and can trigger the check engine light.

* Misfires: A faulty injector can cause a cylinder to misfire, which is when the fuel/air mixture doesn't ignite properly. Misfires are a common cause for the check engine light to illuminate.

* Oxygen Sensor Readings: The oxygen sensor in the exhaust system monitors the amount of oxygen in the exhaust gases. If a fuel injector is malfunctioning, it can throw off the oxygen sensor readings and trigger a check engine light.

* Emissions Problems: Fuel injector problems can lead to increased emissions, which can trigger the check engine light due to emissions regulations.

Signs of Faulty Fuel Injectors

Besides the check engine light, here are other signs that your fuel injectors might be failing:

* Rough Idling: The engine may idle unevenly or shake.

* Loss of Power: You may notice a decrease in acceleration or overall power.

* Poor Fuel Economy: Your car may get significantly worse gas mileage.

* Backfiring: You might hear popping or backfiring sounds from the engine.

* Engine Hesitation: The engine may hesitate or stumble when accelerating.

Important Note: While faulty injectors can cause the check engine light, it's crucial to get your vehicle diagnosed properly by a mechanic. Other issues can also trigger the check engine light, so a professional diagnosis will help pinpoint the exact problem.