Parts for your 2015 Mitsubishi Asx-Knock sensor

Understanding the Knock Sensor on the 2015 Mitsubishi ASX

The 2015 Mitsubishi ASX, a popular compact SUV in the Australian market, comes equipped with several modern engine management components to ensure efficient performance and reliability. One such component is the knock sensor. So, does this particular model utilise a knock sensor? The straightforward answer is yes. The 2015 Mitsubishi ASX does feature a knock sensor as part of its engine management system.

But what exactly is a knock sensor, and why is it important? A knock sensor is a small but critical device that plays a vital role in protecting the engine from damage caused by detonation or knocking. Engine knocking happens when the air-fuel mixture in the cylinders ignites prematurely or unevenly during combustion. This can cause a pinging noise and shock waves that put stress on engine components, leading to reduced performance, higher emissions and in severe cases, engine damage.

The knock sensor is typically mounted on the engine block, cylinder head or intake manifold, and its job is to listen carefully for those damaging vibrations that come from knocking. It picks up the engine's unique vibration signature and detects the high-frequency sounds that indicate knock. When the sensor detects knocking, it sends a signal to the engine control unit (ECU). The ECU then adjusts the ignition timing, usually by retardation, which prevents knock from happening and helps maintain smooth running.

For the 2015 Mitsubishi ASX, which uses a range of petrol engines (often the 1.6L or 2.0L MIVEC engines depending on the market), the knock sensor is an indispensable part of the engine's electronic management system. This sensor helps strike the balance between performance and fuel efficiency while protecting the engine from harmful knock-related damage.

Regular maintenance of the knock sensor isn't usually part of standard servicing because the sensor itself does not wear in the traditional sense. However, if the knock sensor or its wiring develops a fault, it can cause the engine to run poorly, the check engine light to turn on or even cause decreased fuel economy and power. Diagnosing a faulty knock sensor involves scanning the car's ECU for specific trouble codes related to engine knock or sensor malfunction.

If the knock sensor is found to be faulty on a 2015 Mitsubishi ASX, replacing it is a straightforward job but best handled by someone with mechanical experience or an authorised technician. The sensor itself is bolted to the engine block or cylinder head, where it detects engine vibrations directly. When replacing the knock sensor:

• Make sure the engine is cool before starting, it's located near hot engine parts.
• Disconnect the battery to avoid electrical issues while working.
• Carefully unplug the wiring connector from the knock sensor.
• Remove the sensor bolt and take out the old sensor without damaging surrounding components.
• Fit the new knock sensor, tightening the bolt to the specified torque.
• Reconnect the wiring and battery.
• Clear any old fault codes from the ECU using a diagnostic scanner.

Maintaining a healthy knock sensor is one part of making sure the 2015 Mitsubishi ASX engine runs efficiently and reliably over many kilometres. While the sensor itself is robust, its longevity can be influenced by factors such as engine vibrations, heat, corrosion or wiring issues. If the engine is running rough or the check engine light appears with a knock sensor fault code, it's definitely worth getting the sensor inspected as part of servicing.

For owners who enjoy tuning their Mitsubishi ASX or using lower-grade fuel, the knock sensor becomes even more important. It protects the engine when combustion conditions are more demanding or variable. Using good quality fuel and following the recommended servicing schedule will help the knock sensor work as it should without issues.

Having a properly functioning knock sensor means the ECU can optimise spark timing to get the best balance of power, economy and engine protection. If the sensor is not working, the ECU often plays it safe by retarding timing excessively or going into limp mode, leading to a less enjoyable driving experience.

So when it comes to the 2015 Mitsubishi ASX, the knock sensor is not just relevant but a key part of the engine's brain. Keeping it in top shape is good for the car's performance and longevity, making it a smart thing to be aware of during servicing or if issues arise.