Conditions for Setting the DTC
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 30°C (86°F) warmer than the IAT sensor for less than 1 s.
OR
- The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 15°C (59°F) warmer than the IAT sensor and NO engine block heater was detected for less than 1 s.
OR
- The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 15°C (59°F) warmer than the IAT sensor, the engine cranked for greater than 10 s without starting and NO engine block heater was detected for less than 1 s.