Your vehicle's MAP sensor plays a crucial role in keeping it performing at its best. Here's how it works and the warning signs that it might be failing.

Learn more on what a Map Sensor is and it’s failing symptoms. Our team of experts put together a guide on everything you need to know about map sensors.

The P0171 "System Too Lean, Bank One" fault code you experienced is only one of the many fault codes a MAF sensor can set when under- or over-reporting the amount of air flowing into the engine.

First, you can check for codes, but like we just said, many times a failing MAP sensor won't throw a code until it has died altogether.