Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How to Buy Good Quality Sensors

How to Buy Good Quality Sensors

good quality sensors

Sensors for autos have many of the same characteristics that other types of sensors do – they are created to detect a signal, respond to chemical or physical variations such as distance or temperature. These signals are then converted into electrical signals which are used to make a decision or a state change in moving parts.

Vehicles use a variety of sensors to help the driver make decisions. There are sensors whose primary responsibility is to assist the driver in parking their vehicle, while MAP sensors help control fuel metering and are found within the internal combustion engine control system. Extreme driving conditions mean that automotive sensors need to be exceptionally durable in order to maintain operations within acceptable parameters. Vehicle sensors are generally specific to the type of vehicle that you’re driving, so be sure you’re purchasing sensors that will work on your car.

Here are precautions to note when purchasing sensors:

  • Parking sensors Parking sensors were created in the 1990s to assist drivers to park their vehicles in tight spaces. Ultrasonic transducers are fitted into the rear end of the vehicle, and create a signal that measures the distance between the obstacle and the rear of the vehicle. Warning sounds are emitted once the vehicle gets too close – getting louder the closer the obstacle becomes.

  • MAP sensors: MAP sensors, or manifold absolute pressure sensors, are used to provide information in a vehicle with a fuel-injected engine about the difference between the earth’s atmosphere and the air mass flow rate of the engine. The information that is fed from the sensor provides enough information that the control unit can decide what the air-fuel mix should be on an ongoing basis.

  • Automotive oxygen sensors: Automotive oxygen sensors are utilized in combustion engines in order to determine the correct air-fuel mix – and a faulty sensor could cause the mix to be either too lean or too rich. A rich ratio causes part of the fuel to remain unburned, while a lean mixture has too much oxygen and this can lead to reduced throughput and additional nitrogen-oxygen pollutants. These sensors are not meant to directly measure the air and fuel before they enter the system, but are part of the continuous feedback loop going back to the vehicle’s computers.

  • Tire-Pressure monitoring sensors: Tire-Pressure monitoring sensors do exactly what it sounds like they do. They keep track of the actual tire pressure of the vehicle on an ongoing basis, with an eye towards providing you vital information that can help keep you safe. When you know in advance that you have a tire that’s going flat, it can remind you to go a little slower until you can get to a service station to find out what’s wrong.

The wide range of different automotive sensors available are all important to vehicles in different ways.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...


Related questions

Q: My car lacks power and shakes and stalls.

This may be a sign of a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses...

Q: Q: Fuel gauge always reads Full tank

Hello. There is a fuel level gauge on the fuel pump and it reads the amount of gas that is in the fuel tank. It sounds like this gauge has broken on your fuel pump. The gauge cannot be repaired...

Q: Car starts and run suddenly it shuts off. It turns back runs and shuts off again

Depending on what speed the stalling tends to occur, this may be a couple of different possibilities. If this happens at lower speeds or idle, this may be a dirty or faulty idle air control valve. I this happens at...