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The most important causes and indicators of car sensor malfunctions

Car indicators malfunctions

    Sensors may affect the performance of the car engine because any malfunction in it can lead to the failure of the entire sensor system, and the sensors provide the car computer with information, as they are all closely related to it, and over time the sensor system can be exposed to failure and send a false reading of the system To alert the driver that there is a malfunction, and the sensors basically work to monitor the basic functions necessary for the functioning of the car; From delivering fuel and controlling smoke emitted when the car is running, and to clarify that, we will present in this article the most important causes of car sensors malfunction, and how to fix them.

Car indicators malfunctions
Car indicators malfunctions

Causes of sensor malfunction

    The sensor system inside the car consists of several sensors, and the following is an explanation of the main reason for the failure of each sensor:

  • Overheating of the car engine will damage the coolant sensor inside the engine, and wear and long use can cause the sensor to malfunction as well.
  • Battery damage results in the tire pressure sensor stopping, and this problem can be solved by changing the sensor only, and the accumulation of dirt inside the sensor can damage it, and this problem can be solved by cleaning it.

Indicators of malfunction of car sensors

    Several indicators indicate a malfunction in the car's sensors, and the following are details of them:

Indications of oxygen sensor damage

1. Check engine alert appears

    The check engine alert appears in orange on the dashboard if the oxygen sensor is bad, and it can also light up due to another problem in the car engine, or a problem in the hood, so it is preferable to check the car to find out the problem; By resorting to the mechanic.

2. Consuming more fuel

    A malfunction in the oxygen sensor may cause an increase in fuel consumption despite the reduced mileage of the car, due to the low engine quality due to the low oxygen to fuel ratio significantly, which leads to a decrease in the effectiveness of oxygen over time, causing overtime to increase fuel consumption by an amount larger than normal.

3. Annoying engine noises

    The damaged oxygen sensor causes a problem with the engine or the timing of its work, as well as annoying sounds caused by the oxygen sensor working in an irregular manner, which indicates a defect in it, by observing the periods of fuel combustion and other functions of the engine, as the car’s acceleration can be observed Slow despite driving at high speed, and vice versa.

4. The appearance of an unpleasant car smell

    Damage to the oxygen sensor and not changing it quickly can lead to an unpleasant smell when the car engine is running, which is the smell caused by the emission of carbon dioxide, and the spread of this gas threatens the life of the driver and passengers, and this problem can cause spending a lot of money To find out the problem and solve it.

Cooling sensor damage indicators

1. The appearance of a false reading of the sensor

Damage to the coolant sensor can cause a false or low reading of its control system, causing it to operate in an open-loop, thus causing increased fuel consumption about the mileage and excessive smoke.

2. Engine overheating

A defect in the coolant sensor can lead to an increase in the engine temperature, as the coolant cools the engine, and when there is any defect or decrease in the coolant fluid, this leads to an increase in the engine temperature, causing damage to the sensor responsible for operating the fan, Therefore, it is recommended to change the coolant sensor when this problem appears.

Indications of damage to the map sensor

    The map sensor monitors the pressure difference resulting from engine operation, and compares between the intake vacuum pressure and the external pressure, as it benefits from this information in determining the pressure on the engine, and when the engine contains a fuel injection system, it does not use the airflow sensor, based on the MAP sensor for airflow, and damage to the map sensor may lead to a false reading in the frequency reading or engine pressure, and the emergence of timing problems, so it is preferable to check the sensor to look for a leak or change it when confirming its damage, and to clarify the matter we present the following most important indicators Indication of damage to the map sensor:

  • Feeling of vibration in the car.
  • High fuel consumption.
  • The car stops depressing the piston instead of moving it.

Air mass sensor damage indicators

    The mass air sensor is located between the air filter (MAF) and the throttle, and it adopts a hot wire to do its job and help airflow. The accumulation of dirt and debris can reduce the airflow, causing the mass airflow sensor to degrade or malfunction. Solve this problem by using a special sensor cleaner, or resorting to a specialist to clean the sensor or change it when necessary, and to clarify the matter by presenting the following are the most important indicators of damage to the air mass sensor:

  • Difficulty operating the car.
  • Having problems accelerating the car while driving.


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