Impala models from different generations have different maintenance requirements, but Chevy does the work to make the part accessible. Luckily, a new sensor is relatively inexpensive, and you can get one wherever you buy Chevy Impala auto parts. A poor fuel/air mixture can also have consequences for the exhaust, especially if that system was already in need of some maintenance attention. While it’s possible to drive under these conditions, many Impala owners report that the longer the MAF sensor goes unaddressed, the more likely you are to experience worsening symptoms. Sometimes, your overall engine power will also be noticeably less efficient. More often, you’ll notice fuel efficiency drop along with power output and acceleration. It’s rare for a damaged or dysfunctional MAF sensor to result in a vehicle that won’t start, but it is a possibility in extreme cases. ![]() The first thing you’re likely to notice is a check engine light. The result is lower gas mileage and power output, along with a less responsive engine. Without the data the ECM needs to calculate the right mixture, engine efficiency goes down. The result is obvious whenever you drive a car with mass air flow sensor problems. It’s an essential part of a responsive, automated fuel-injection system because without the air flow information, the fuel/air mixture created would be a rough approximation of what is needed. Your mass air flow sensor measures the air coming into the engine, which allows the ECM to calculate a more precise fuel-to-air ratio on an ongoing basis in fuel-injected cars. The mass air flow sensor is no exception. Like valves and other parts you plan on replacing, you’re going to need to address a few of them over time if you have an Impala that you keep for years and years. ![]() Sensors are exposed to the heat and pressure in the engine, and those stresses simply take a toll. ![]() While your sensors aren’t built with a life expectancy like spark plugs, they do occasionally fail, especially after a lot of miles. That’s because people who put a lot into a car tend to keep it for a long time and drive it a lot, so parts that are built to wear out will need to be replaced. Damaged and malfunctioning sensors are an unfortunate fact of life for car owners, especially those who work on customizing their vehicles.
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