All You Need To Know About Check Engine

What is my “check engine” light?

The check engine light is additionally referred to as the malfunction pilot light, and its job is to try to do exactly what it’s named – to point any problems or malfuncti

ns with the engine, or anywhere else within the car that’s connected to the engine. \This light is found above the wheel within the control panel in most vehicles. The symbol resembles an engine and is usually lit-up in orange or red when there’s a problem.

What does the service engine light mean?

The service engine soon light means just what it says – that you simply should have your engine serviced soon. It doesn’t mean that the engine has weakened , or maybe that it’s in peril of imminent meltdown. What it does mean is that you simply should make a meeting together with your mechanic at your earliest opportunity to trace the source of the malfunction and have the vehicle repaired if necessary. 

  • Loose/Faulty Gas Cap
  • Scheduled Service/Low Fluid Levels
  • Oxygen Sensor Failure
  • New Spark Plugs Needed
  • Mass Airflow Sensor Failure
  • Faulty converter 

As we’ve mentioned, a Service Engine Soon or Check Engine light will come on when there’s a problem . a number of these range from small and quick to repair , to severe problems which will be catastrophic to your engine.

Let’s check out a couple of of the foremost common:

Loose/Faulty Gas Cap

The first thing to try to do when a Service Engine light comes on is to see the gas cap. When your gas cap is loose or features a crack, fuel vapors can seep out, causing the ECM to think there’s a problem . this will cause a drop by mileage and increase emissions, so it’s best to handle it directly . Whether you didn’t screw it on properly last time you filled up, or if it’s broken, the fix is straightforward .


First, with the engine off and having a minimum of a half tank of gas, unscrew the cap then put it back on. it always requires a couple of recycles before the sunshine will explode , meaning you’ll got to drive the car a couple of times. If after 30-min to an hour of driving pass and it doesn’t close up , you ought to consider buying a replacement one for around $10 at your nearest auto parts store.


If the indicator light doesn’t close up shortly then , there must be another issue.


Scheduled Service/Low Fluid Levels

While being every week or two past a scheduled car care won’t depart an alert, if you’re critically low on oil, it might. an equivalent goes for other maintenance items, like an air cleaner , which, if it’s unable to do its job, can throw the entire system off balance.


If your Check Engine light appears thanks to a maintenance item, counting on the make of your car, it’ll likely accompany another indicator. like an oil light, a coffee coolant light, or a tire pressure light.


Oxygen Sensor Failure

Your engine is meant to work at an optimal level, using sensors to stay an eye fixed on things. a number of these include the mass airflow sensor, engine speed sensor, spark knock sensor, and coolant sensor. If something happens that jeopardizes the power of your engine to take care of this level, things can worsen quickly.


Then there’s the O2 sensor, which monitors the extent of oxygen within the exhaust because it comes out of the engine. If there’s not enough, it’s running rich, too much, and it’s running lean.

When there’s a problem together with your O2 sensor, it’ll likely trigger a service engine soon light. Why? Because it can’t properly maintain the right air/fuel mixture within the combustion chambers. Alongside this indicator, you’ll also likely notice reduced fuel economy, misfiring, or a rough idle.

New Spark Plugs Needed

Sparks plugs are what ignite the air/fuel mixture within the combustion chambers of your engine. Signs you would like new ones include reduced mileage, a scarcity of acceleration, misfiring, hard starts, a rough idle, or (you guessed it) a Service Engine light.

While older copper spark plugs were only good for about 30,000 miles, new platinum or iridium tipped one can last 100,000 miles or more.

If you ignore them for too long, your engine may fail to run in the least, which may be a solid reason to exchange them at the primary signs of a problem. Especially since they only cost about $10 each, and with labor, you ought to be ready to replace all of them at an area buy but $250.

Mass Airflow Sensor Failure

The mass airflow sensor instructs the ECM on what proportion of fuel it needs to support the quantity of air it’s receiving. Signs of a drag include the engine having a tough time starting, stalling, or hesitating at idle or while accelerating. If these issues persist, your car will provide you with a warning with a Service Engine Soon light.

While you’ll drive with a faulty mass airflow sensor, you shouldn’t do so for too long. Ignoring it can cause costly repairs, like ruining your converter or O2 sensors. Costs (including labor) should range between $200 to $400, counting on if you accompany aftermarket parts or OEM.

Faulty converter 

A combustion engine works by taking gasoline or diesel (made from petroleum) and igniting it to supply power. With pure petro, the byproduct would only be CO2 and water. But these fuels contain the maximum amount as 150 added chemicals, meaning more pollutants get created during the method.

A converter is responsible for converting these harmful gases into something less taxing on the environment. the foremost common reasons they could have problems are thanks to the opposite items on this list failing first.

Guest Autor: Syed Ghulfam Ali Abidi.


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