What Causes Check Engine Light To Stay On

01 Apr, 2018 Post a Comment

The check engine light service engine soon comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. The most common issue that triggers the check engine light last year was having to replace the oxygen sensors o2 in the vehicle.

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It could be a temporary problem caused by a change in humidity or other factors.

What causes check engine light to stay on. Generally the problem is in the emissions or something that is affecting the effectiveness of the emissions but other causes can trigger the light to come on too. In such cases the light should go off by itself after a short time. Here is a list of the top 10 reasons why your check engine light turns on.

Finding out why your check engine light is on may help you save gas and avoid more problems down the road. It seals the filler neck allowing the fuel system to become pressurized. Even if the light is only on a short time a code will be stored in the ecu for later retrieval.

Let s take a look at the most common issues. Yes even a loose fuel cap can cause the check engine light to come on. Worn plugs and plug wires can cause clogged catalytic converter or damage to ignition coils and o 2 sensors these are the most common reasons but there are others too.

Tire balancing tax and more than 8 quarts of oil extra. The fuel cap does more than just prevent fuel from spilling out. It notably prevents gasoline fumes from leaving the fuel tank and it helps keep the whole system under the correct pressure.

Many people probably just ignore the check engine light when it comes on but it can be triggered by a number of issues. At participating dealers only. There are so many possible reasons for the check engine light to come on so using a reader to retrieve the on board diagnostic obd codes can be helpful when the problem is not immediately evident.

A loose gas cap is one of the most common reasons why the check engine light turns on. Occasionally the check engine light comes on when nothing is wrong with the car said steve mazor chief automotive engineer for the auto club of southern california. The cap is a crucial part of a car s fuel delivery system.

Your car s diagnostic systems check the fuel system for leaks this way. In general five common malfunctions can cause the check engine light to come on and some of them are simple to fix yourself.

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