P1603 OBD Trouble Code

1 result found

P1603 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

Loss Of Sensing Diagnostic Mode Data Conditions

Cause

DTC P0322 not set, engine speed over 500 rpm for 10 continuous seconds, then the PCM did not receive any Sensing Diagnostic Mode data or received invalid data during a 1 second period

Try also: https://www.obd-codes.com/p1603