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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.6L (LGH) - DTC P0016 Through DTC P11DC >> Diagnostic Information and Procedures >> DTC P111C >> Code Description >> Circuit/System Description

Circuit/System Description

The charge air cooler (CAC) temperature sensor and intake air temperature (IAT) sensor 2 are variable resistors. The IAT sensor 2 is located in the CAC inlet duct. The CAC temperature sensor is located in the CAC outlet duct before the throttle body assembly. The engine control module (ECM) supplies 5 V to the signal circuits, and a ground for each sensor's low reference circuit. The ECM monitors the CAC temperature sensor and the IAT sensor 2 circuits in order to calculate the temperature of the fuel air. The ECM monitors the CAC sensor and IAT sensor 2 signal for excessively high or low voltages, or for a voltage that is not in correlation with the other sensor's start up signal.

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