Diagnostic Trouble Code Index for December 2020
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 | P0171 | Fuel System Lean (Bank 1) | Chevrolet, Ford, Toyota |
| 3 | P0174 | Fuel System Lean (Bank 2) | Ford |
| 3 | P0401 | Insufficient EGR Flow Detected | Buick, Suzuki |
| 2 | P0087 | Fuel Rail Pressure Too Low | Audi, Volkswagen |
| 2 | P0299 | Turbocharger Engine Underboost | Ford, Isuzu |
| 2 | P0316 | Misfire Occurred In First 1,000 Revolutions | Ford |
| 1 | B2948 | security system sensor power circuit high | Chevrolet |
| 1 | B2958 | Security system sensor data circuit high | Chevrolet |
| 1 | B2960 | Security system sensor data incorrect but valid | Chevrolet |
| 1 | B2961 | key in ign. circuit malfunction | Chevrolet |
| 1 | P0016 | Crankshaft/Camshaft Timing Misalignment | Chevrolet |
| 1 | P0017 | Crankshaft Position - Exhaust Camshaft Position Correlation | Chevrolet |
| 1 | P0089 | Fuel Pressure Regulator Performance | Chevrolet |
| 1 | P0101 | MAF Sensor Performance | GMC |
| 1 | P0128 | Engine Coolant Temperature Below Thermostat Regulating Temperature | Kia |
| 1 | P0130 | Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Malfunction | Lincoln |
| 1 | P0148 | Fuel Delivery Error | Dodge |
| 1 | P0150 | Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Malfunction | Lincoln |
| 1 | P0172 | Fuel System Rich (Bank 1) | Dodge |
| 1 | P0191 | Fuel Rail Pressure Sensor Performance | Ram |
| 1 | P0234 | Turbocharger Engine Overboost | Ford |
| 1 | P0300 | Multiple Cylinder Misfire Detected | Mercedes-Benz |
| 1 | P0302 | Cylinder 2 Misfire Detected | Ford |
| 1 | P0304 | Cylinder 4 Misfire Detected | Ford |
| 1 | P0306 | Cylinder 6 Misfire Detected | Ford |
| 1 | P0320 | No Crank Reference Signal To PCM | Ford |
| 1 | P0340 | Camshaft Position Sensor Circuit Malfunction | Ford |
| 1 | P0410 | Secondary Air System Performance | Mercedes-Benz |
| 1 | P0415 | Secondary Air Injection System Switching Valve 'B' Circuit Malfunction | Mercedes-Benz |
| 1 | P0442 | EVAP System Small Leak Detected | Chevrolet |
| 1 | P0452 | Fuel Tank Pressure Sensor Circuit Low Voltage | Chevrolet |
| 1 | P0455 | EVAP System Large Leak Detected | Toyota |
| 1 | P0456 | EVAP System Very Small Leak Detected | Infiniti |
| 1 | P1127 | ETCS Actuator Power Source Circuit Malfunction | Ford |
| 1 | P1151 | Heated Oxygen Sensor (Bank 2 Sensor 1) Indicates A/F Ratio Too Lean | Ford |
| 1 | P1361 | ICM Ignition Control Circuit Low Voltage | Honda |
| 1 | P1366 | Top Dead Center Sensor 2 Circuit Intermittent Signal | Honda |
| 1 | P1604 | PCM Internal Dual-Port Ram Read/Write Integrity Failure | Toyota |
| 1 | P228D | Fuel Pressure Regulator 1 control performance | Chevrolet |
| 1 | P240F | EGR delayed reaction | Mercedes-Benz |
| 1 | P4417 | Evap Purge flow actuator stuck on | Toyota |
| 1 | P5052 | Idle air control system | Land Rover |
