Circuit/System Verification

WARNING: This page is about a different car, the 2013 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Start the engine. DTC P0C19 should not be set.
Verify DTC P0A90 is not set.
- If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Verify the engine or AC compressor is not seized or binding.
- If the engine is seized or binding, refer to Symptoms - Engine Mechanical .
- If the AC Compressor is seized or binding, refer to Noise Diagnosis - Air Conditioning (A/C) System .
Verify the A15 starter generator is not seized or binding.
If DTC P0C19 is set, replace the A15 starter generator.