Diagnostic Trouble Code Index for February 2026
Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.Diagnostic Trouble Codes (DTC)
| Count | Trouble Code | Sample Definition | Manufacturers |
| 2 | P0171 | Fuel System Lean (Bank 1) | Saturn, Subaru |
| 2 | P0300 | Multiple Cylinder Misfire Detected | Ford, Isuzu |
| 1 | B2193 | chain of bcm-ecm | Nissan |
| 1 | C1130 | engine 1 fuel cut system fault | Nissan |
| 1 | P0011 | Intake Camshaft Position System Performance | Ford |
| 1 | P0021 | Camshaft Position 'A' Timing Over-Advanced / System Performance (Bank 2) | Ford |
| 1 | P0068 | Throttle Body Airflow Performance | Audi |
| 1 | P0093 | Fuel System Large Leak Detected | Ford |
| 1 | P0301 | Cylinder 1 Misfire Detected | Ford |
| 1 | P0304 | Cylinder 4 Misfire Detected | Ford |
| 1 | P0305 | Cylinder 5 Misfire Detected | GMC |
| 1 | P0441 | EVAP Purge System Performance | Jeep |
| 1 | P0491 | Secondary AIR System Insufficient Flow Detected (Bank 1) | Volkswagen |
| 1 | P0507 | Idle Speed High | Audi |
| 1 | P219C | fuel/air mixture cylinder 1 unbalanced sporadic | Hyundai |
| 1 | P219E | fuel air mix cyl 3 unbalanced sporadic | Hyundai |
| 1 | P2279 | Intake Air System Leak | Audi |
