Engine Management

Precision engineering, Advanced design and the highest OEM quality; these are the exceptional qualities you’ll find in DENSO’s range of engine sensors including a guarantee of perfect fitment, reliability and superior on road performance.

Air Flow Sensor

The mass air flow sensor measures the amount of air volume flowing into a car’s engine, and sends the electronic control unit (ECU) a voltage that represents the airflow. DENSO’s improved air flow meter features a new sensing element bypass structure, which significantly reduces contamination of the sensing element for more accurate detection while also reducing the measuring units size.

The DENSO difference:

  • Glass film coated sensing elements reduces contamination
  • and improves reliability
  • Platinum wire sensing element responds quickly to changes in air flow
  • DENSO’s innovative designs reduce the size and weight

Cam Angle Sensor

Camshaft and Crankshaft Position Sensors detect camshaft and crankshaft rotation during one engine-combustion cycle. DENSO produces both Magnetic Resistant Element (MRE) type and Magnetic Pick-Up (MPU) type sensors.

DENSO produces both Magnetic Resistant Element (MRE) type and Magnetic Pick-Up (MPU) type sensors.

Crankshaft Position Sensor

Crankshaft Position Sensor

EGR Valve

EGR valves are vital in the reduction of Nitrous Oxides (NOx) in exhaust emissions. NOx are formed during high temperature combustion. To reduce the amount of NOx produced, a portion of the exhaust gases are recirculated back into the engine’s air intake, lowering the combustion temperature and thus reducing the amount of NOx produced.

Responsive: Optimal exhaust gas flow adaptation for all engine temperatures and driving conditions.

Precision: Integrated position sensor allows more accurate control of exhaust gases, resulting in a higher level of precision.

Durability: Reduction in the effect of exhaust pressure and exhaust flow provides carbon corrosion resistance and longer life.

Emission Reduction: Reduced NOx emissions.


The vacuum type consists of an EGR valve. The pressure inside the diaphragm chamber of the EGR valve is changed to adjust the valve opening.


The EGR valve is driven by the DC motor. The motor speed is reduced by a gear and the valve connected to the valve shaft is rotated, adjusting the area of the EGR passage.

The valve opening is detected by the angle sensor, which uses a Hall element, and sent to the ECU as feedback.

Exhaust Gas Temperature Sensor (EGT)

Exhaust Gas Temperature Sensor (EGT)

O2 Sensor

DENSO have been leaders in the field of oxygen sensor design since the technology became widely adopted by vehicle manufacturers in the early to mid 1990’s. The company pioneered air/fuel sensor technology which is used in many of today’s more advanced vehicles. Through our industry reputation for reliability and quality, DENSO has become one of the largest OE suppliers of these parts worldwide.

The DENSO difference:

  • Superior design maximizes engine performanceand fuel efficiency while reducing fuel consumption and harmful emissions
  • First Time Fit delivers the right part the first time
  • Wide coverage and unique applications for Asian and European cars
  • Original equipment quality and reliability

The Role of O2 Sensors

Oxygen Sensors (O2) work together with the vehicle’s fuel injection system, Catalytic Converter and engine management system or electronic control unit (ECU) to help achieve the lowest possible output of environmentally harmful engine emissions.

Theoretically, at this ratio, all of the fuel will be burned using almost all of the oxygen in the air. The remaining oxygen must be exactly the right quantity for the Catalytic Converter to function efficiently.
The O2 Sensor monitors the percentage of unburned oxygen present in the car’s exhaust gases.

According to whether the oxygen content in the exhaust gas is too high (a lean mixture) or too low (a rich mixture) the O2 Sensor transmits a fast-changing, fluctuating voltage signal to the ECU.

The ECU responds to this information by adjusting the air/fuel mixture entering the Catalytic Converter. The goal is to keep the air/fuel ratio very close to the ‘stoichiometric’ point, which is the calculated ideal ratio of air to fuel entering the Catalytic Converter.