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International Automotive Technicians Network

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
5P0171Fuel System Lean (Bank 1)GMC, Subaru, Toyota
2P0174Fuel System Lean (Bank 2)GMC, Toyota
2P0300Multiple Cylinder Misfire DetectedDodge, GMC
2P0305Cylinder 5 Misfire DetectedFord, Mercedes-Benz
1B1213Less Than Two Keys Programmed To The SystemLincoln
1P0016Crankshaft/Camshaft Timing MisalignmentMercedes-Benz
1P0018Crankshaft Position - Intake Camshaft Position Correlation (Bank 2)Mercedes-Benz
1P0019Crankshaft Position - Exhaust Camshaft Position Correlation (Bank 2)Cadillac
1P0032Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit High VoltageNissan
1P0087Fuel Rail Pressure Too LowToyota
1P0116ECT Sensor PerformanceBMW
1P0118ECT Sensor Circuit High VoltageBMW
1P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low VoltageGMC
1P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low VoltageGMC
1P0191Fuel Rail Pressure Sensor PerformanceToyota
1P0275Cylinder 5 Balance System MalfunctionFord
1P0302Cylinder 2 Misfire DetectedAudi
1P0304Cylinder 4 Misfire DetectedMercedes-Benz
1P0306Cylinder 6 Misfire DetectedMercedes-Benz
1P0420Catalyst Efficiency Below Normal (Bank 1)Ford
1P0446EVAP Vent System PerformanceGMC
1P0491Secondary AIR System Insufficient Flow Detected (Bank 1)Volkswagen
1P0492Secondary air flow bank 2Volkswagen
1P0672Glow Plug No. 2 Control Circuit MalfunctionFord
1P0700Automatic Transmission System Malfunction DetectedSubaru
1P1130Air Fuel Ratio Sensor (Bank 1 Sensor 1) Circuit MalfunctionVolvo
1P1148Closed Loop Malfunction Detected (Bank 1)Nissan
1P1260Immobilizer System MalfunctionLincoln
1P1521Incorrect Engine Oil TypeMazda
1P1564ASCD Steering Switch Circuit MalfunctionNissan
1P1718Transmission Fluid Temperature Sensor Continually Reading HotSubaru
1P2004Intake Manifold Runner Control Stuck OpenMercedes-Benz
1P2173High Airflow / Vacuum Leak Detected (Slow Accumulation)Jeep
1P2188Fuel Trim System Rich At Idle (Bank 1)Hyundai
1P2279Intake Air System LeakHonda
1P2403Leak Diagnosis Pump - Reed SwitchPorsche
1P2422EVAP Canister Vent Shut Valve Close MalfunctionHonda
1P2463Diesel Particulate Filter Soot Level AccumulationChevrolet
1U0101Lost Communication With TCMNissan
1U1001Lost Communication With XXX Control ModuleNissan