Cadillac XTS high intake temperature issue reported on Cadillac XTS

Some Cadillac XTS owners report experiencing high intake temperature issues, often indicated by the P0113 diagnostic trouble code (DTC), which points to a problem with the Intake Air Temperature (IAT) sensor circuit. This high input signal can result in the sensor reading an elevated temperature, potentially leading to incorrect fuel delivery and ignition timing. Symptoms of this issue may include the illumination of the Malfunction Indicator Lamp (MIL), commonly known as the Check Engine Light. If not addressed, high intake temperature can lead to poor engine performance, decreased fuel efficiency, and even potential engine damage over time. The IAT sensor plays a crucial role in monitoring the temperature of air entering the engine, allowing the Engine Control Unit (ECU) to adjust parameters for optimal performance. To resolve these issues, some owners are advised to conduct thorough diagnostics and consider cleaning the Mass Air Flow (MAF) sensor before replacing any parts to ensure proper engine performance and prevent long-term damage.