Diagnostic Trouble Code Index for December 2025
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 | P0301 | Cylinder 1 Misfire Detected | Ford |
| 1 | P0303 | Cylinder 3 Misfire Detected | Cadillac |
| 1 | P0304 | Cylinder 4 Misfire Detected | Cadillac |
| 1 | P0316 | Misfire Occurred In First 1,000 Revolutions | Ford |
| 1 | P0341 | CMP Sensor Performance | Chevrolet |
| 1 | P0345 | Camshaft Position Sensor 'A' Circuit Malfunction (Bank 2) | Ford |
| 1 | P0390 | Exhaust Camshaft Position Sensor Circuit Malfunction (Bank 2) | Ford |
| 1 | P0394 | Camshaft Position Sensor 1 - Signal Intermittent | Ford |
