The Best 2003 Stalling With No Check Engine Light Ideas. The idle air control valve is a small valve on the engine’s intake system that reads the air intake as it comes into the motor. Web on october 12, 2016.
Web if the check engine light is on and you find a lean code (p0171 or p0174), or a random misfire code (p0300), check for vacuum leaks. In some cases, the cause of the stalling may not be related to any of these components. It all depends on the configuration programmed into the computer to signal the fault.
