Code Repair Importance and Difficulty Level
Repair Importance Level
If not other symptoms are present, fixing the problem could wait but may fail the emissions test.
The problem will more than likely fail the emissions test and may affect engine performance and/or gas mileage.
Problem requires immediately attention, may affect engine performance and/or reduce gas mileage, and could damage other components.
Repair Difficult Level
Repair may just require to clear the engine code, retight connector, fuel cap or check/top off fluids.
Repair could require replacing a component (sensor, solenoid or switch) and clearing the engine code.
Expert repair recommended. The problem may require special tools and experienced technician to diagnose and repair.