A common emissions code seen in the field, a P0420 trouble code indicates that the catalytic converter isn’t functioning efficiently. To work at peak efficiency, the emissions or feed gases entering the catalytic converter need to be perfectly balanced and not excessively elevated. To resolve the...
A random misfire problem (code P0300) means the misfire is jumping around from cylinder to cylinder and that multiple cylinders are experiencing a misfire problem. This is usually due to a lean fuel condition which, in turn, is being caused by a vacuum leak, an air leak in the intake man...
A "random misfire code" (P0300) is even harder to diagnose because there can be numerous causes. A random misfire usually means the air/fuel mixture is running lean. But the cause might be anything from a hard-to-find vacuum leak to dirty injectors, low fuel pressure, a weak ignition c...
If a shop pulled a DTC code P0300 and found AFM to be the issue, it may not be too late to try the disabler. It will show up as a misfire code in a cylinders 1,4,6, or 7. There is a filter screen under the oil pressure sender that may be clogged and not getting ...