Clogged Catalytic Converter / P0300 Code

Gixxerman

After months of dealing with a P0300 code, my car went into Limp or Safe Mode while on my way home. It wouldn't go over 40mph and 2500 RPM's. I drove it to the dealer, they conducted an initial test, then a compression test. I was told it was a clogged Catalytic Converter causing a P0300 code. When the first Check Engine Soon light was received, I changed the entire coil pack, all spark plugs, cleaned the MAF sensors and checked for vacuum leaks without no success. Has anyone ever heard of clogged Catalytic Converters causing a P0300 code