Common car sensors and what they do

Crankshaft Position Sensor: A crank sensor is an electronic device used in both petrol and diesel engines to monitor the position or rotational speed of the crankshaft.
Oxygen Sensor: An oxygen sensor (or lambda sensor) measures the proportion of oxygen (O2) in the air-fuel mixture. O2 sensors make modern electronic fuel injection and emission control possible by helping determine in real time if the air–fuel ratio of a combustion engine is optimal.
Throttle position Sensor: Throttle Position Sensor reports the gas pedal position to the car’s computer, aiding in the calculation of proper fuel/air mixture in the engine.

Mass Air Flow Sensor: All cars take air from the outside and pass it into the engine through the air filter. The airflow sensor measures the amount of air entering the engine.
Intake Air Temperature Sensor: The Intake Air Temperature sensor (IAT) monitors the temperature of the air entering the engine. The engine computer needs this information to estimate air density so it can balance air air/fuel mixture
Fuel injector: Fuel injection is a system for introducing fuel into automotive engines. On diesel engines, fuel injection is a necessity, whilst on petrol engines fuel injection is an alternative to the carburetor.
Vehicle Speed Sensor: Vehicle Speed Sensor (VSS) measures the speed of a vehicle’s wheel rotation
Manifold Pressure Sensor: The manifold pressure sensor (MAP sensor) provides pressure information of the air intake into the engine
Engine Coolant Temperature Sensor: The coolant temperature sensor is used to measure the temperature of the engine coolant of an internal combustion engine. The readings from this sensor are then used to adjust the fuel injection and ignition timing.
Turbocharger/Supercharger: A turbocharger, or turbo increases an engine’s efficiency and power output by forcing extra air into the engine combustion chamber

Introducing CaRPM. Our new look!







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What is OBDII and what it means for your car?

What is OBD?

On-board diagnostics (OBD) refers to a vehicle’s self-diagnostic and reporting capability. All the data from a car is stored in the car’s Engine Control Module (ECM) and can be read through its OBD port. The OBD port is located near the driver’s seat & there’s no need to open your car’s bonnet. Inexpensive Bluetooth scanners, available on any e-commerce websites, can be used to read this data. If you want to know the location of the port in your car, just comment below and we’ll show you where your port is.


Why is this data useful?

We all want better fuel economies for our cars, right? Using these scanners, we can get an accurate picture of our car’s fuel economy, how much is it, what are the things reducing it etc etc. Not only this, if you car’s check engine light comes on, you will know exactly what the problem is and can ensure proper service from the mechanic.

Fuel economy sample chart

How can I use this?

All you need to do is get a scanner and download the CaRPM app. It shows you how your car is doing in real time, if it has has faults that could lead to breakdowns and how its health is varying per trip. You can buy a scanner either from eBay, Amazon or just comment here and we’ll ship one to you. Download the CaRPM app here.

CaRPM home screen

Share this with your fellow drivers and make your driving experience a richer one.