Diagnostic Trouble Code Index for May 2023
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 |
| 4 | P0300 | Multiple Cylinder Misfire Detected | Chevrolet, Ford, GMC, Jeep |
| 2 | P0171 | Fuel System Lean (Bank 1) | Ford, Volvo |
| 2 | P0172 | Fuel System Rich (Bank 1) | Chevrolet, Ford |
| 2 | P0304 | Cylinder 4 Misfire Detected | BMW, Mercedes-Benz |
| 2 | P0441 | EVAP Purge System Performance | Chrysler, Lexus |
| 1 | C121C | Torque request signal denied | Jeep |
| 1 | P0019 | Crankshaft Position - Exhaust Camshaft Position Correlation (Bank 2) | Jeep |
| 1 | P0042 | p208064- | Mercedes-Benz |
| 1 | P0101 | MAF Sensor Performance | Nissan |
| 1 | P0133 | Heated Oxygen Sensor (Bank 1 Sensor 1) Slow Response | Jeep |
| 1 | P0141 | Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction | Honda |
| 1 | P0175 | Fuel System Rich (Bank 2) | Ford |
| 1 | P0299 | Turbocharger Engine Underboost | Jeep |
| 1 | P0301 | Cylinder 1 Misfire Detected | Mercedes-Benz |
| 1 | P0302 | Cylinder 2 Misfire Detected | Mercedes-Benz |
| 1 | P0305 | Cylinder 5 Misfire Detected | BMW |
| 1 | P0306 | Cylinder 6 Misfire Detected | BMW |
| 1 | P0344 | Camshaft Position Sensor Signal Intermittent | Chrysler |
| 1 | P0369 | Camshaft Position Sensor Circuit Intermittent (Bank 1 Sensor 2) | Chrysler |
| 1 | P0411 | Secondary AIR System Incorrect Airflow Detected | Pontiac |
| 1 | P0420 | Catalyst Efficiency Below Normal (Bank 1) | Chevrolet |
| 1 | P0442 | EVAP System Small Leak Detected | Lincoln |
| 1 | P0446 | EVAP Vent System Performance | Lexus |
| 1 | P0455 | EVAP System Large Leak Detected | Chevrolet |
| 1 | P050A | Cold Start Idle Air Control System Performance | Mercedes-Benz |
| 1 | P050D | Cold Start Rough Idle | Chevrolet |
| 1 | P060A | PCM Internal Control Module Error | Honda |
| 1 | P124C | 5 injector high control circuit shorted to control circuit | Chevrolet |
| 1 | P1564 | ASCD Steering Switch Circuit Malfunction | Nissan |
| 1 | P2080 | Exhaust Gas Temperature Sensor Circuit Performance (Bank 1 Sensor 1) | Mercedes-Benz |
| 1 | P2096 | Downstream Fuel System Lean - HO2S-12 (Bank 1 Sensor 2) | Jeep |
| 1 | P2110 | Electronic Throttle Control - Forced Limited RPM | GMC |
| 1 | P2112 | Electronic Throttle Control - Unable To Open | Ford |
| 1 | P2181 | Cooling System Performance | Audi |
| 1 | P2188 | Fuel Trim System Rich At Idle (Bank 1) | Buick |
| 1 | P2190 | Fuel Trim System Rich At Idle (Bank 2) | Buick |
| 1 | P219E | fuel air mix cyl 3 unbalanced sporadic | Mercedes-Benz |
| 1 | P249D | Reductant Injection control at limit - Flow to Low | Chevrolet |
| 1 | P2556 | Engine coolant level sensor/ switch circuit | Audi |
| 1 | P4047 | P042ffa- | Mercedes-Benz |
| 1 | P6A90 | p040473- | Mercedes-Benz |
| 1 | U0020 | Can C bus off perfromance | Jeep |
| 1 | U0137 | ip module | Chevrolet |
| 1 | U0191 | pcm lost communication with fuel pump module | Chevrolet |
| 1 | U1260 | Data Circuit Message | Audi |
| 1 | U1407 | Implausible Maximum Engine Torque Request Signal Received | Buick |
