Diagnostic Aids

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Insufficient vehicle interior heating is an indication of improper thermostat operation.
The scan tool Desired ECT Sensor and the ECT Sensor parameters should be within 5° C (41° F) when the engine is at operating temperature.
A resistance condition in the ECT sensor circuits may cause this DTC. This condition results in a greater voltage on the ECT sensor signal circuit, which is interpreted by the ECM as a colder ECT.