Diagnostic Trouble Code Index for January 2021
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 |
| 5 | P0171 | Fuel System Lean (Bank 1) | GMC, Subaru, Toyota |
| 2 | P0174 | Fuel System Lean (Bank 2) | GMC, Toyota |
| 2 | P0300 | Multiple Cylinder Misfire Detected | Dodge, GMC |
| 2 | P0305 | Cylinder 5 Misfire Detected | Ford, Mercedes-Benz |
| 1 | B1213 | Less Than Two Keys Programmed To The System | Lincoln |
| 1 | P0016 | Crankshaft/Camshaft Timing Misalignment | Mercedes-Benz |
| 1 | P0018 | Crankshaft Position - Intake Camshaft Position Correlation (Bank 2) | Mercedes-Benz |
| 1 | P0019 | Crankshaft Position - Exhaust Camshaft Position Correlation (Bank 2) | Cadillac |
| 1 | P0032 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit High Voltage | Nissan |
| 1 | P0087 | Fuel Rail Pressure Too Low | Toyota |
| 1 | P0116 | ECT Sensor Performance | BMW |
| 1 | P0118 | ECT Sensor Circuit High Voltage | BMW |
| 1 | P0151 | Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage | GMC |
| 1 | P0157 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage | GMC |
| 1 | P0191 | Fuel Rail Pressure Sensor Performance | Toyota |
| 1 | P0275 | Cylinder 5 Balance System Malfunction | Ford |
| 1 | P0302 | Cylinder 2 Misfire Detected | Audi |
| 1 | P0304 | Cylinder 4 Misfire Detected | Mercedes-Benz |
| 1 | P0306 | Cylinder 6 Misfire Detected | Mercedes-Benz |
| 1 | P0420 | Catalyst Efficiency Below Normal (Bank 1) | Ford |
| 1 | P0446 | EVAP Vent System Performance | GMC |
| 1 | P0491 | Secondary AIR System Insufficient Flow Detected (Bank 1) | Volkswagen |
| 1 | P0492 | Secondary air flow bank 2 | Volkswagen |
| 1 | P0672 | Glow Plug No. 2 Control Circuit Malfunction | Ford |
| 1 | P0700 | Automatic Transmission System Malfunction Detected | Subaru |
| 1 | P1130 | Air Fuel Ratio Sensor (Bank 1 Sensor 1) Circuit Malfunction | Volvo |
| 1 | P1148 | Closed Loop Malfunction Detected (Bank 1) | Nissan |
| 1 | P1260 | Immobilizer System Malfunction | Lincoln |
| 1 | P1521 | Incorrect Engine Oil Type | Mazda |
| 1 | P1564 | ASCD Steering Switch Circuit Malfunction | Nissan |
| 1 | P1718 | Transmission Fluid Temperature Sensor Continually Reading Hot | Subaru |
| 1 | P2004 | Intake Manifold Runner Control Stuck Open | Mercedes-Benz |
| 1 | P2173 | High Airflow / Vacuum Leak Detected (Slow Accumulation) | Jeep |
| 1 | P2188 | Fuel Trim System Rich At Idle (Bank 1) | Hyundai |
| 1 | P2279 | Intake Air System Leak | Honda |
| 1 | P2403 | Leak Diagnosis Pump - Reed Switch | Porsche |
| 1 | P2422 | EVAP Canister Vent Shut Valve Close Malfunction | Honda |
| 1 | P2463 | Diesel Particulate Filter Soot Level Accumulation | Chevrolet |
| 1 | U0101 | Lost Communication With TCM | Nissan |
| 1 | U1001 | Lost Communication With XXX Control Module | Nissan |
