Im getting p 0300 in my 1998 Chevy lumina after car got hot and radiator replaced.

Question

The car was running just fine until it overheated I went and baught a new radiator then check engine light started flashing then loss of power.hard to start dies at idling ect.

Answer 1

Hi there,

This code means there are either multiple misfires or there is a misfire and the computer cannot determine which cylinder is misfiring. It sounds possible that there is a head gasket issue causing the problem including the overheating. The overheating could have damaged the plug wires or the spark plugs as well.