DTC P1AAD Chevrolet
Lost Communication With HVAC Control Module
Lost Communication With HVAC Control Module
Description
Key on, and the ECM detected that it has lost communication with the HVAC Control Module during its initial startup. The Engine Control Module (ECM) communicates with all databus-capable control modules via a CAN databus. These databus-capable control mod
Cause and Solution
ECM has failedTerminal resistance for CAN-bus are faultyCan data bus wires have short circuited to each otherThe HVAC control module has failed
Video Guide
Diagnostic Info
- DTC Code: P1AAD
- Brand: Chevrolet