Diagnostic Trouble Code Index for January 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 | P0171 | Fuel System Lean (Bank 1) | Dodge, GMC |
| 2 | P0340 | Camshaft Position Sensor Circuit Malfunction | Chevrolet, Jeep |
| 2 | P1409 | EGR Vacuum Regulator Solenoid Circuit Malfunction | Ford |
| 2 | P1504 | Idle Air Control Solenoid Circuit Malfunction | Ford |
| 1 | P000A | Camshaft 1 Position Slow Response | Jeep |
| 1 | P000B | Camshaft 2 Position Slow Response | Jeep |
| 1 | P0013 | Exhaust Camshaft Position Actuator Solenoid Control Circuit (Bank 1) | Buick |
| 1 | P0102 | MAF Sensor Circuit Low Frequency | Ford |
| 1 | P0106 | MAP Sensor Performance | GMC |
| 1 | P0128 | Engine Coolant Temperature Below Thermostat Regulating Temperature | Dodge |
| 1 | P0138 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage | Buick |
| 1 | P013A | Heated Oxygen Sensor (Bank 1 Sensor 2) Slow Response - Rich To Lean | Buick |
| 1 | P015B | Delayed response rich to lean B1S1 | Chevrolet |
| 1 | P016D | excessive time to enter closed loop fuel pressure control | BMW |
| 1 | P0174 | Fuel System Lean (Bank 2) | GMC |
| 1 | P0300 | Multiple Cylinder Misfire Detected | Dodge |
| 1 | P0327 | Knock Sensor Circuit Low Voltage (Bank 1) | GMC |
| 1 | P0336 | Crankshaft Position Sensor Performance | GMC |
| 1 | P0341 | CMP Sensor Performance | Jeep |
| 1 | P0420 | Catalyst Efficiency Below Normal (Bank 1) | Buick |
| 1 | P0463 | Fuel Level Sensor High Voltage | GMC |
| 1 | P0513 | Invalid SKIM Key Detected | Dodge |
| 1 | P0685 | Engine Controls Ignition Relay Control Circuit Malfunction | BMW |
| 1 | P0700 | Automatic Transmission System Malfunction Detected | Chevrolet |
| 1 | P0877 | Transmission Fluid Pressure Switch 4 Circuit Low Voltage | GMC |
| 1 | P1050 | Oxygen Sensor (Bank 2 Sensor 1) Stuck Lean | Chevrolet |
| 1 | P105A | Reductant PUMP SLOW SPEED | Chevrolet |
| 1 | P1391 | CKP Or CMP Sensor Signal Intermittent | Jeep |
| 1 | P1450 | Unable to Bleed Up Fuel Tank Vacuum | Ford |
| 1 | P1497 | EGR Valve Stepper Motor Coil 2 Circuit Malfunction | Mini |
| 1 | P1604 | PCM Internal Dual-Port Ram Read/Write Integrity Failure | Toyota |
| 1 | P2092 | Intake Camshaft Position Actuator Solenoid Control Circuit Low (Bank 2) | Mercedes-Benz |
| 1 | P2094 | Exhaust Camshaft Position Actuator Solenoid Control Circuit Low (Bank 2) | Mercedes-Benz |
| 1 | P2271 | Heated Oxygen Sensor (Bank 1 Sensor 2) Signal Stuck Rich | Buick |
| 1 | P3541 | The Actuation of ignition coil 4 has an electrical fault or open circuit | Mercedes-Benz |
| 1 | P3551 | The Actuation of ignition coil 5 has an electrical fault or open circuit | Mercedes-Benz |
| 1 | P3561 | The Actuation of ignition coil 6 has an electrical fault or open circuit | Mercedes-Benz |
| 1 | U0020 | CAN bus off Performance | Ram |
| 1 | U0121 | Lost Communication With Antilock Brake System Module | Chevrolet |
| 1 | U2418 | Unknown | Chevrolet |
| 1 | U2419 | Unknown | Chevrolet |
