Most modern vehicles have a PCV valve, which should be checked periodically to make sure that it is not clogged with deposits from the exhaust waste. The objective of this procedure is to show you how to check and clean the PCV valve part of the emission control system.
The objective of this procedure is to show you how to retrieve, record and clear stored OBD I & II diagnostic trouble codes using a scan tool. Remember, when retrieving codes for an OBD I vehicle, clear the codes then start the vehicle and recheck for any codes that reset. When diagnosing and OBD II vehicle, do not clear the codes until the vehicle is repaired.
