A P0302 code on your 2019 Chevrolet Malibu indicates the PCM detected misfires in cylinder 2. The 2019 Malibu offered two turbocharged engine options, each requiring proper diagnosis.
2019 Malibu Engine Options
The 2019 Malibu offered the 1.5L turbo 4-cylinder (standard) and 2.0L turbo 4-cylinder (Premier). Both are turbocharged with direct injection. Cylinder 2 is the second position from front on both inline-4 engines.
Age-Related Considerations
At 5+ years old, the 2019 Malibu may experience misfire from wear items. Common causes include worn spark plugs, failing ignition coils, carbon buildup on intake valves (direct injection), and fuel injector issues.
Turbo Engine Specifics
Turbocharged engines are more sensitive to ignition system condition due to higher cylinder pressures. A marginally worn spark plug that might work on a naturally aspirated engine can cause misfires under boost.
Diagnostic Approach
The coil swap test is efficient for identifying ignition failures. Move the cylinder 2 coil to another position and monitor for misfire migration after clearing codes.