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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 278 (Engine Controls And Fuel - 3.6L (LGX LF4) - DTC P0117 (LGX) To DTC P0697) >> Diagnostic Information and Procedures >> DTC P026A: Charge Air Cooler (CAC) Low Efficiency >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Test the IAT Sensor 3 by varying the sensor temperature while monitoring the air temperature with a thermometer. Compare the readings with the scan tool IAT Sensor 3 parameter. The values should be within 5%.
    • If not within the specified range 

      Replace the B111B Turbocharger Boost/Intake Air Temperature sensor (IAT Sensor 3).

    • If within the specified range 
  2. All OK.
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