Diagnostics tools 29 www.aftermarketonline.net JUNE 2024 MAF SENSORS Mass Air Flow (MAF) sensors are essential elements in helping achieve this aim and knowing how to deal with them offers a great profit opportunity, as TecAlliance reports that 89 percent of vehicles in Europe are fitted with a MAF sensor. MAF sensors come in a few key variations: nonheated, heated hot-wire technology and hot-film technology. These MAF sensors have no moving parts and use electrical current to measure air mass. Situated between the intake manifold and the air filter, the MAF sensor is vital to determining the amount of air flowing into the intake system of diesel and petrol combustion engines, for an engine with optimum performance on start, under load, idle and more. While no one can predict the future, it is possible for technicians to identify some early signs of possible damage and catch a failing MAF before it has fully failed or to extend the service life enough for planned replacement. Carrying out the correct diagnostic process by reading stored fault data and physical checks prior to replacing components is always a must-have. One way for garages to ensure customer satisfaction is by fitting NTK MAF sensors from Niterra UK Ltd, whose range features 98-part numbers, all perfectly matched to the vehicle models for which they are catalogued. Introduced to the UK market in 2017 alongside Manifold Absolute Pressure (MAP) sensors, they have proved to be a popular addition to the NTK portfolio that includes the recently introduced exhaust pressure sensors, lambda, NOx, camshaft and crankshaft, EGT sensors and EGR valves. The main aim of professional garages is to keep their customers happy by ensuring their cars run smoothly and reliably. One way of achieving this is by fitting the correct, high-quality parts when they enter the workshop. NTK IS THE SMOOTH OPERATOR... To discover more about NTK products and services please visit www.ngkntk.com/uk MAF SENSORS ARE PRONE TO THEIR PERFORMANCE BEING AFFECTED BY: • DUST: Particles of dust in the air being drawn through the sensor can attach to the sensing surfaces which reduces the performance of the sensor. • WATER: Rainwater ingress can damage a sensor if it penetrates the intake system after heavy rain/ flooding. • OIL: Oil mist within the intake system will soon contaminate sensor surfaces. This can be caused by excessive oil venting from the engine, mechanical wear, oil level too high or a defective turbocharger. • VIBRATION: Vibration over time or an abnormal impact. FAILURE MODES
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