Is your truck running rough, down on power, or struggling with inconsistent fuel economy? The Walker Air Charge Temperature (ACT) Sensor restores accurate intake air temperature data your engine depends on to run cleanly, efficiently, and strongly. This sensor measures the temperature of the incoming air and sends that information to the ECM, which can properly adjust fueling, timing, and combustion strategy in real time. When it starts to fail, you can experience hesitation, poor throttle response, hard starts, or reduced performance under load. Replacing it with this direct-fit solution brings back smooth drivability, consistent power delivery, and reliable operation, whether you're towing, daily driving, or working the truck hard.

Built for durability in demanding engine environments, this sensor is manufactured with high-quality, OE-matched materials that withstand extreme heat, vibration, and contamination from dust, oil, and moisture. Its thermistor-based sensing element changes resistance with air temperature, delivering accurate and stable readings to the ECM for precise fuel and timing adjustments. Engineered to meet OE specifications and fully tested for fit, form, and function, it provides long-lasting reliability, consistent signal output, and dependable performance in harsh diesel and gas applications.