Is your truck running rough, struggling with cold starts, or losing fuel efficiency due to incorrect air temperature readings? The Walker Air Charge Temperature (ACT) Sensor restores accurate intake air data your engine relies on to run cleanly and efficiently. This sensor measures incoming air temperature and sends that information to the ECM, which can adjust fuel delivery, timing, and overall engine performance. When it fails, you can experience hesitation, poor drivability, rough idle, or increased fuel consumption. Replacing it with this direct-fit solution restores smooth operation, consistent power, and dependable performance, whether you're daily driving or working under load.

Built for durability in harsh engine environments, the Walker ACT Sensor is manufactured from high-quality, heat-resistant materials that withstand extreme temperature swings, vibration, and contamination from dust and oil. Its thermistor-based sensing element changes resistance with air temperature to deliver precise, real-time readings to the ECM, helping maintain optimal combustion and efficiency. Engineered to meet OE specifications and fully tested for fit, form, and function, this sensor delivers long-lasting reliability and consistent performance in demanding diesel and gas applications.