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International Automotive Technicians Network

Diagnostic Trouble Code Index for December 2019


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
4P0171Fuel System Lean (Bank 1)Chevrolet, Nissan, Toyota
3P0303Cylinder 3 Misfire DetectedKia, Ram, Subaru
2P0191Fuel Rail Pressure Sensor PerformanceKia, Mercury
2P0300Multiple Cylinder Misfire DetectedChevrolet, Nissan
2P0401Insufficient EGR Flow DetectedFord, Honda
2U0073Control Module Communication Bus OffChevrolet, Toyota
1B1005Micu lost comm w/relay control unitAcura
1B1006Acura
1B1007Micu lost comm w/headlight switchAcura
1B1008Micu lost comm w/ guage module a/t messageAcura
1B1010Micu lost comm w/ door multiplex cuAcura
1B1011Micu lost comm with guage control moduleAcura
1C1203ecm communication circuit malfunctionToyota
1C1259HV control system regen. malfunctionLexus
1C1310can communication codeLexus
1P0030Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Control Circuit MalfunctionMercedes-Benz
1P0087Fuel Rail Pressure Too LowKia
1P0088Fuel Rail Pressure Too HighRam
1P0097Intake Air Temperature Sensor 2 Circuit Low VoltageFord
1P0110Intake Air Temperature Sensor Circuit MalfunctionFord
1P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low VoltageMercedes-Benz
1P0135Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit MalfunctionMercedes-Benz
1P0175Fuel System Rich (Bank 2)Ford
1P0180Fuel Tank Temperature Sensor Circuit MalfunctionFord
1P0193Fuel Rail Pressure Sensor Circuit High VoltageJaguar
1P0210Fuel Injector 10 Control Circuit MalfunctionFord
1P0299Turbocharger Engine UnderboostVolkswagen
1P0301Cylinder 1 Misfire DetectedSubaru
1P0302Cylinder 2 Misfire DetectedSubaru
1P0304Cylinder 4 Misfire DetectedSubaru
1P0305Cylinder 5 Misfire DetectedKia
1P0400EGR System Recirculation FlowSubaru
1P0420Catalyst Efficiency Below Normal (Bank 1)Ford
1P0430Catalyst System Low Efficiency (Bank 2)Ford
1P0455EVAP System Large Leak DetectedPontiac
1P0491Secondary AIR System Insufficient Flow Detected (Bank 1)BMW
1P0507Idle Speed HighAudi
1P0523Engine Oil Pressure Sensor Circuit High VoltageHonda
1P0540Intake Air Heater Feedback Circuit MalfunctionChevrolet
1P0700Automatic Transmission System Malfunction DetectedChevrolet
1P0A78Drive Motor 'B' Inverter PerformanceLexus
1P1125Accelerator Pedal Position System MalfunctionPontiac
1P117BFuel performance direct injectorToyota
1P2096Downstream Fuel System Lean - HO2S-12 (Bank 1 Sensor 2)Subaru
1P2119Throttle Closed Position PerformanceSaturn
1P2135Throttle Position Sensor 1-2 Correlation ErrorFord
1P2138Accelerator Pedal Position Sensor 1-2 Correlation ErrorPontiac
1P219ABank 1 air/fuel ratio imbalanceFord
1P2279Intake Air System LeakAudi
1P2308Ignition Coil 3 Secondary Circuit Insufficient IonizationRam
1P2359Boost Pressure Sensor Voltage Too LowDodge
1P2544Transmission Torque Request Circuit MalfunctionChevrolet
1U0101Lost Communication With TCMChevrolet
1U0293Lost Communication With HV/ECUToyota
1U1210DVD-ROM SeekFord
1U1510Lost communication with restraint control moduleFord
1U2120Lost communication with steering control moduleFord
1U4018Invalid data received from ECM/PCMFord
1U4298Invalid data received from steering control moduleFord