One problem related to crankcase (pcv) has been reported for the 2003 Chevrolet Malibu. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Malibu based on all problems reported for the 2003 Malibu.
Problems with pc valve on Chevrolet Malibu. Emission error-the computer had given incorrect readings/pcv valve smog valve. (ongoing problem).