Loss Of HVAC Serial Data
Table of contents
P1605 CADILLAC Possible Causes
- Faulty Heating, Ventilation, and Air-Conditioning (HVAC) Module
- Heating, Ventilation, and Air-Conditioning (HVAC) Module harness is open or shorted
- Heating, Ventilation, and Air-Conditioning (HVAC) Module circuit poor electrical connection
How do I fix code P1605 CADILLAC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1605 CADILLAC code
The cost of diagnosing the P1605 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1605 CADILLAC Description
The P1605 code sets when the Powertrain Control Module (PCM) detects an invalid or no serial data from the Heating, Ventilation, and Air-Conditioning (HVAC) Module Programmer for a period of 11 seconds.