Diagnostic Trouble Code Index for September 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 | P0087 | Fuel Rail Pressure Too Low | Ford, Honda |
| 2 | P0171 | Fuel System Lean (Bank 1) | Chevrolet, Honda |
| 1 | P0138 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage | Jeep |
| 1 | P0335 | Crankshaft Position Sensor Circuit Malfunction | Jeep |
| 1 | P0523 | Engine Oil Pressure Sensor Circuit High Voltage | Jeep |
| 1 | P0573 | Brake Switch 1 Circuit Stuck Off | GMC |
| 1 | P0642 | Sensor Reference Voltage 1 Circuit Low | Jeep |
| 1 | P0680 | MAP/MAF - Throttle Position Correlation | Audi |
| 1 | P0B70 | Engine Coolant Flow Low/Performance | Audi |
| 1 | P2111 | Electronic Throttle Control - Unable To Close | Jeep |
| 1 | P2122 | Accelerator Pedal Position Sensor 1 Circuit Low Voltage | Jeep |
| 1 | P2279 | Intake Air System Leak | Audi |
| 1 | P2646 | VTEC Oil Pressure Switch Circuit Low Voltage | Honda |
| 1 | P5070 | Idle Speed to High | Audi |
