Buick Regal: Diagnostic Information and Procedures

 Crankcase Ventilation System Description

General Description A crankcase ventilation system is used to consume crankcase vapors in the combustion process instead of venting them to atmosphere. Fresh air from the intake system is supplied to the crankcase, mixed with blow by gases and then passed through a calibrated orifice into the inta

 Symptoms - Lighting

NOTE: The following steps must be completed before using a symptom table. 1. Perform the Diagnostic System Check - Vehicle before using a symptom table in order to verify that all of the following conditions are true: There are no DTCs set. The control modules can communicate via the serial dat