Your IAT sensor is located in the engine’s intake air system and plays a crucial role in the engine control system by providing input to the Engine Control Unit (ECU) or Powertrain Control Module (PCM). The ECU uses information from the sensor to adjust various engine parameters such as fuel injection timing, air-fuel mixture, ignition timing, and turbocharger boost pressure based on the temperature of the incoming air. Let’s take a closer look at this important component and some signs that you may have a faulty or malfunctioning IAT sensor – not to be confused with a car air intake pipe.
Most common symptoms of malfunction
Check engine light
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The check engine light activating on your vehicle’s dashboard could be caused by a malfunctioning sensor indicating a problem with the intake air temperature sensor or related circuitry. To find out more, take a look at our article Check Engine on the dashboard.
Poor engine performance
A faulty IAT sensor can result in incorrect intake air temperature readings, leading to incorrect fuel/air ratio calculations. This can result in poor engine performance such as rough idle, hesitation, reduced power, or sluggish acceleration.
Difficulty starting or stalling
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If the IAT sensor provides inaccurate readings, the engine may have difficulty starting, especially in cold weather. It may also cause the engine to stall or die shortly after starting.
FAQs
Can I drive with a faulty IAT sensor?
It is generally possible to drive with a defective IAT sensor, but we don’t recommend doing so. We advise having it checked, repaired, or replaced to ensure the optimum operation of your vehicle.
Can I change the IAT sensor myself?
The procedure for replacing the IAT sensor can vary depending on the make and model of your car. If you have a Zafira, you can get an appropriate intake air temperature sensor for the Vauxhall Zafira. In some cases, it may be easily accessible and relatively simple to replace. In other cases, it may be necessary to disassemble parts of the intake system. If you have experience in car repairs and the necessary tools, you may be able to replace it yourself. Otherwise, it’s advisable to seek the assistance of a qualified mechanic.
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How much does it cost to replace an IAT sensor?
The cost of replacing an IAT sensor can vary depending on your vehicle’s make and model. Sensor prices start at about £14, so be sure to shop around if you decide to buy an intake air temperature sensor. If you choose to have it replaced by a mechanic, remember that you will also be charged for labour.
How do I do maintenance on my sensor?
Servicing an intake air temperature sensor is a relatively straightforward process that involves a few simple steps. First, gather the necessary tools such as screwdrivers, a soft cloth, and electrical contact cleaner. Locate the IAT sensor, and disconnect it by removing the wiring harness connector or unscrewing it from its mounting bracket. Take care not to damage the wires or connector pins. With the sensor disconnected, remove it from its housing by using a screwdriver to loosen any screws or bolts holding it in place.
Inspect the sensor for physical damage, corrosion, or dirt accumulation, looking for frayed wires or bent connector pins. If it appears damaged, it may need to be replaced rather than serviced. If the sensor is dirty, clean it carefully with a soft cloth or brush. For stubborn dirt, use an electrical contact cleaner designed for electronic components. When clean and dry, reinstall it, ensuring that it is firmly in place without over-tightening. Finally, test the sensor by starting the engine to make sure it is working properly.
Maintenance can save you money in the long run. By proactively maintaining equipment, you can prevent major breakdowns that could result in costly repairs or replacements. In addition, well-maintained systems tend to operate more efficiently, reducing energy consumption and minimising operating costs.
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