How long does the charge air temperature sensor last?

The charge air temperature sensor, also called the intake air temperature sensor, is designed to monitor the temperature of the air entering the vehicle's engine. The engine computer must have this information so it can determine how to balance the air/fuel mixture. Hot air is less dense than cold air, so it needs less fuel to maintain the proper ratio. Conversely, cold air is denser than hot air and requires more fuel.

Every time you drive your car, the charge air temperature sensor works by relaying information to the engine computer. In addition to monitoring engine air temperature, it also works with your vehicle's air conditioning and heating system. Considering the load that this component performs on any given day, it is vulnerable to damage. It can get worse due to old age, heat, or pollution, and when it starts to fail, it can react slowly or not at all. Like most of your car's electronic components, the charge air temperature sensor can last about five years.

Signs that your vehicle's charge air temperature sensor may need to be replaced include:

• Autumn
• Heavy starts
• Unstable interior temperature

Dirty sensors can cause problems and can sometimes be cleaned. However, this is a very inexpensive part and it is best to just replace it. If you suspect your charge air temperature sensor is faulty or out of order, see a professional mechanic. An experienced mechanic can diagnose problems with your engine and replace the charge air temperature sensor if necessary.