Home » How long will the check engine light stay off if you disconnect the battery?

How long will the check engine light stay off if you disconnect the battery?

How long will the check engine light stay off if you disconnect the batteryWhat is the Check Engine Light (CEL)?

The check engine light (CEL) is one of the crucial segments of the onboard diagnostics (OBD2) system. CEL under the dashboard is a profuse warning system that effectively maintains the ideal consequences in the car’s environment. The check engine light channels the onboard diagnostics system, which has detected a rigorous malfunction in the vehicle’s main emissions chamber, and the ignition key, fuel chamber, and the particular exhaust systems feel the effect of the circumstances. It could be caused by something as simple as a loose gas cap, a faulty oxygen sensor or spark plug, or something as severe as a faulty catalytic converter.

Almost all the vehicles have onboard diagnostics to detect the enclosure engine-related issues affecting the emissions control systems. If you see the check engine light blinking in a periodical manner, that usually indicates a misfiring and subconscious issue that requires sudden repair. The catalytic converter can be the worst sufferer if ignoring this issue. 

Typical Causes Of The Check Engine Light

There are so many causes that the CEL introduces itself out of the engaging issues that might be superficial in the arena of the error codes. Let us look into some of the major reasons for the CEL in the vehicle.Causes Of The Check Engine Light

  • There must be loose or missing insiders in the primary endeavors of the vehicle. If the gas is missing somehow, it can cause the check engine light to come on.
  • The faulty catalytic converter may be one of the dominant causes of illumination of the check engine light. Another underappreciated reason must be the faulty ignition coil. If the ignition is not under control, then it is prevalent that the CEL must be activated. 
  • You could have heard of the bad spark plugs and electrical wirings that also propagate the check engine light. The spark plug is that crucial element that administers the correct ratio of the air and fuel, and for that, it is very much significant that fresh air comes into the chamber quite often.
  • A defective oxygen sensor rapidly emanates the check engine light as it is mainly responsible for balancing the proper ratio of the air and fuel in this segment. An affected and corrupted mass air flow sensor is another trump card for producing the CEL, and as well a faulty charging system does the same thing.

What is the way to Reset the Check Engine Light by Disconnecting the Battery?

The process of disconnecting the car Battery from the vehicle is very much straightforward, and anyone can perform this process without having any vast knowledge of it. Let us see the process in a nutshell, 

First of all, remove the negative signed cable from the vehicle’s battery and then Pop the hood. You can use a wrench to remove the negative wire, and after you have withdrawn the cable, which is often covered with a black cap, marked as a bluish icon with a minus sign from the terminal of the battery. 

Secondly, You need to drain the ultimate convertible electricity from the outstanding capacitor and then Press and hold the bumping switch for more, not than one minute, and then make sure that the switch on the vehicle’s lights is on the verge of going. The internal wirings and the capacitor’s main section must be held so that it can execute the check engine light.

In the end, disconnect the battery and wait for 15 to 20 minutes in order to virtualize the safety measure pinpoints in a diversified and intensified volume making it the ideal and proactive example of being nice to the Check Engine Light. By disconnecting the cables, the internal algorithm and the circuits will be refreshed, and also the Check Engine Light will be reset by doing so. 

Is It Ethical to Drive With The Check Engine Light On?

This is a question that always comes to our mind: can I drive while checking the Engine Light is on? Unfortunately, the answer is quite a bit shaky and mystical. Most often, it depends on the situation. If the check engine light is activated and you are also driving the car without any distress, then it is permitted to drive to some extent. On the contrary, if the check engine light is on and simultaneously the car is experiencing the same issue, then it is not prudent to continue driving.

Driving while CEL is in operation might not bust the car suddenly, but it has long-term consequences that can be devastating for the car, and you need to solve the problem as early as possible. So, in a nutshell, if you see the check engine light is on and the car is running fine, then it is more or less safe to drive. But the experts suggest that you must check the issue and fix the problem and then continue driving. This will lengthen the lifespan of the vehicle.

How long does the check engine light stay off if you disconnect the battery?

It depends entirely on the battery and how much time the CEL will stay silent after it is detached. If you disconnect the battery for about 15 to 20 minutes, it will make sure that the vehicle systems are completely submerged and are reset while pretending the main fixtures are in a justified aspect. You need to attach the negative cable back to the enlisting terminal and make it completely distinguishable. When you detach the battery entirely from its actual place, it will clear the error codes and exorbitantly initialize the check engine light.

When you first try to start your vehicle, the check engine light flashes unanimously and then turns off after the engine engages other modules subsequent to the system. This is a perfect indication of the onboard diagnostics computer working in full swing, and if it doesn’t happen, the battery will be the worst sufferer.


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