CUSTOMER CONCERN The engine developed a loud noise, stalled, and will only run briefly. DTCs P0016, P0018, P3190, P3191, P3193, and P0A0F are stored. CAUSE Camshaft-correlation and mechanical timing inspection confirmed incorrect camshaft timing caused by the timing-belt drive. CORRECTION Remove and replace the timing belt and restore the crankshaft-to-camshaft timing alignment.

CUSTOMER CONCERN The check engine light is on with catalyst-efficiency DTC P0420 after induction-system service. CAUSE Fuel-control, oxygen-sensor, and converter testing confirmed that the catalytic converter was no longer operating efficiently. CORRECTION Remove and replace the failed catalytic converter.

CUSTOMER CONCERN The engine runs poorly with a knocking noise, inverter-coolant gurgling, and DTCs P0302, P0304, and P3221 stored. CAUSE Cylinder contribution and component-swap testing confirmed failed ignition coils causing the cylinder misfires. CORRECTION Remove and replace the failed ignition coils.