Mercedes Check Engine Light Goes On And Off Randomly Here's What You Need To Know

Mercedes Check Engine Light Goes On And Off Randomly? Here's What You Need To Know

Many people find it unsettling when their check engine light comes on and off at random.

Several factors can cause the check engine light to behave that way. Some of them are listed below.

Check Engine Light Comes On And Off At Random: Here's Why

Potential Reason

No. 1- Bad sensor

The ECU controls the engine's operation based on inputs received from many sensors.

Some of them are;

If any of these sensors malfunction, the check engine light will flash.

Potential Reason No.2Emissions control system is at fault

ECS serves to deal with the following types of emissions;

Crankcase emissions

Evaporative emissions

Tailpipe emissions

If the ECS is at fault, the check engine light will come on and off at random.

Potential Reason

No.3- Something wrong with the ignition system

If the ignition system is at fault, the check engine light will behave erratically.

You read that right.

You need to find out what exactly is wrong with the ignition system of your car.

Potential Reason No.4- Lean/rich air-fuel mixture

Lean or rich engine conditions may also cause the check engine light to illuminate.

You need to find out the culprit that's destabilizing the air-fuel ratio within the engine.

Because leaving the problem unaddressed can cause engine failure.

Wrapping Up

A car with a flashing check engine light is not safe to drive.

The culprit must be identified and taken care of.