P1605 OBD Trouble Code

1 result found

P1605 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

Loss Of HVAC Serial Data Conditions

Cause

DTC P0322 not set, engine speed 500 rpm or higher for 10 continuous seconds, then the PCM detected invalid or no serial data from the HVAC Programmer for a period of 11 seconds

Try also: https://www.obd-codes.com/p1605