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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;
Oxygen
sensor
MAF
sensor
Throttle
position
sensor
Cam/cran
kshaft
sensor etc.

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

Potential Reason No.2-
Emissions 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.

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

The culprit must be
identified and taken
care of.

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THANK YOU

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

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