Engine Sensors

What is a speed sensor?

A speed sensor contains a pulse generator that converts the mechanical rotating movement into an electric signal to the speedometer, through the Electrical Control Unit (ECU). In vehicles without ABS, before 2004, this is mechanically driven from the gearbox. Inside the gearbox, the output shaft contains a gear wheel which rotates with the shaft. Linked to this gear wheel, and driven by it, is a small pinion gear, speedometer drive pinion.

What is a camshaft sensor?

A camshaft sensor monitors the engine speed and valve position. It determines which cylinder is firing to establish injector synchronization and the coil firing sequence. Signals are sent to the Engine Control Module (ECM) to control the fuel injection, the time of ignition and other functions. The camshaft sensor is essential for the engine to keep the correct timing and run properly.

What is a mass air flow meter?

A Mass Air Flow Meter measures the amount of air density flowing into the vehicle’s air intake. The information provided helps the ECU in delivering the proper mix of air-fuel mixture to the engine and the spark timing. The MAF not only measures the volume of air but also compensates for its density.

What is a crankshaft sensor?

A crankshaft sensor defines the rotating speed and the position of the crankshaft. This sensor sends information to the ECU in order to control the fuel injection or the ignition system timing. They display speed on the RPM and are often mounted near the flywheel that serves as a rotating target TDC (top dead centre ).

What is an oil pressure sensor?

An oil pressure sensor measures the oil pressure in the sump and delivers the data to the ECU and pressure gauge of the engine oil. In case of low engine oil pressure, the ECU will report it to the driver and adopt control measures automatically to protect the engine.

What is an air intake temperature sensor?

An air-intake temperature sensor is mounted on the air intake manifold that detects the mass air flow and sends a signal to the ECU. It detects boosts in air temperature, by working in dual stage with the mass air flow sensor which includes a temperature sensor too.

What is a knock sensor?

A knock sensor detects the engine noises through different frequencies and sends a signal to the ECU. The ECU uses this information to limit the spark advance to prevent detonation from occurring. Every vehicle is equipped with a knock sensor in order for the control unit to the ignition system to anticipate a knock or detonation.

What is a TMAP sensor?

A temperature manifold air pressure sensor (TMAP sensor) detects the mass air flow and the pressure and sends a signal to the ECU.

What is an oil level sensor?

An oil level sensor is to ensure that the level of the engine oil does not become dangerously low without being noticed, causing damage to the engine. It can measure the oil level continuously, both in the dynamic and static range.