P0645 OBD Trouble Code

1 result found

P0645 - GM
Type Powertrain - Computer and Auxiliary Outputs - ISO/SAE Controlled
Description

Air Conditioning Clutch Relay Control Circuit Conditions

Cause

Engine speed over 400 rpm, system voltage from 6-18v, then the PCM detected that the Actual and Commanded state of the A/C control circuit did not match, condition met for 5 seconds

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