Parts for your 2017 Mitsubishi Asx-Maf sensor

MAF Sensor on the 2017 Mitsubishi ASX: What You Need to Know

The 2017 Mitsubishi ASX is a popular compact SUV in Australia, and like many modern vehicles, it relies on various sensors to keep the engine running smoothly and efficiently. One common question from owners and mechanics alike is whether the 2017 ASX comes equipped with a Mass Air Flow sensor, or MAF sensor, and if it does, what role it plays in the vehicle's performance.

To clear things up, the 2017 Mitsubishi ASX does indeed have a MAF sensor fitted on its petrol engine variants. The sensor is an integral part of the engine management system, ensuring proper fuel delivery and optimising combustion for both performance and fuel economy. For naturally aspirated petrol versions of the ASX, particularly the common 2.0-litre 4-cylinder engine found in Australian models, a MAF sensor is present and active in the intake system.

However, the diesel variants of the ASX, where fitted, generally rely on different sensors such as Manifold Absolute Pressure (MAP) sensors and do not use a MAF sensor. Diesel engines typically measure air intake differently due to their different combustion process, so the presence of a MAF sensor is mainly relevant for the petrol-engined ASX.

So why is the MAF sensor so important? Its main job is to measure the amount of air entering the engine. This information is vital to the Engine Control Unit (ECU) which uses the data to calculate the exact amount of fuel to inject. By knowing exactly how much air is flowing into the engine, the system can maintain the correct air-to-fuel ratio, helping to reduce emissions, improve fuel efficiency, and maintain smooth engine operation.

On the 2017 Mitsubishi ASX, the MAF sensor sits within the air intake duct, just after the air filter box. As air travels from the filter to the engine, it passes over the sensor, which measures the volume or mass of air coming through. This data is continuous, so the ECU can make real-time adjustments. A faulty or dirty MAF sensor can cause a variety of issues, including rough idling, stalling, poor acceleration, and increased fuel consumption. It may also trigger the Check Engine Light on the dashboard.

For anyone servicing their 2017 Mitsubishi ASX, keeping the MAF sensor in good working order is important. While the sensor itself can last a long time, it can become contaminated with dirt, dust, and oil from the intake air over time. Regular maintenance includes inspecting and cleaning the MAF sensor to ensure it remains accurate. Using specialised MAF sensor cleaner sprays, which are safe and non-abrasive, is recommended rather than regular degreasers or harsh cleaning chemicals.

When inspecting the MAF sensor during servicing, the mechanic will typically remove it from the intake assembly and check for any obvious dirt or debris on the sensor wires or hot film elements inside. If dirt is present, the sensor can be carefully sprayed and allowed to dry completely before reinstalling. It's vital to avoid touching the delicate sensing elements directly, as they can easily be damaged.

If the MAF sensor is found to be faulty or damaged beyond a simple clean, replacing it is the next step. Original Equipment Manufacturer (OEM) replacement sensors designed specifically for the 2017 Mitsubishi ASX are recommended to ensure compatibility and reliability. After replacement, the ECU may need to recalibrate, which can be done simply by driving the car for a short period or, in some cases, with a scan tool.

Generally speaking, the MAF sensor does not require frequent replacement. Under normal driving and servicing conditions, cleaning the sensor every 30,000 to 50,000 kilometres is often enough to keep it in top condition. Keeping the air filter clean and replacing it as per Mitsubishi's recommendations also helps protect the MAF sensor from contamination, extending its life.

In simple terms, the MAF sensor on the 2017 Mitsubishi ASX petrol models plays a crucial role in making sure the engine runs efficiently and cleanly. Paying attention to this small component during routine servicing can help avoid engine problems and improve overall fuel economy. So next time the ASX comes in for a service, it's a good idea to have the MAF sensor checked, especially if the vehicle is showing any signs of engine hesitation or poor fuel consumption.