Code P0113 on the 2024 Chevrolet Trax indicates the Intake Air Temperature (IAT) sensor circuit input is higher than expected - essentially reading that intake air is very cold even when it's not. This affects fuel delivery calculations and engine performance.
IAT Sensor Function
The IAT sensor measures the temperature of air entering the engine. The ECM uses this data to adjust fuel injection timing and quantity - cold air is denser and requires different fuel amounts than warm air. Incorrect temperature readings cause improper fuel calculations.
High Input Explained
The IAT sensor is a thermistor with high resistance when cold (high voltage signal) and low resistance when warm (low voltage). P0113 indicates the signal shows very cold temperature (high resistance/voltage) when conditions suggest it should read warmer. This could be sensor failure, open circuit, or wiring issues.
Effects on Operation
With P0113, the ECM may run the engine richer than needed (compensating for falsely cold intake air), reducing fuel economy. Engine performance may be affected, and other temperature-dependent functions like emissions controls may not operate optimally.
Diagnostic Approach
The IAT sensor is often integrated with the MAF sensor or located in the intake duct. Check sensor resistance against temperature specification. Verify wiring continuity and proper connection. An open circuit (broken wire or unplugged sensor) typically causes P0113.