Diagnostic Trouble Code Index for August 2009
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 |
| 31 | P0300 | Multiple Cylinder Misfire Detected | Audi, BMW, Chevrolet, Chrysler, Dodge, GMC, Honda, Jeep, Kia, Lincoln, Mercedes-Benz, Nissan, Pontiac, Saturn, Volkswagen |
| 14 | P0304 | Cylinder 4 Misfire Detected | Acura, Audi, BMW, Chrysler, Dodge, Ford, Honda, Hyundai, Jeep, Kia, Land Rover, Subaru, Toyota |
| 13 | P0171 | Fuel System Lean (Bank 1) | BMW, Chevrolet, Dodge, Ford, GMC, Hyundai, Jaguar, Nissan |
| 10 | P0301 | Cylinder 1 Misfire Detected | Acura, Chrysler, Dodge, Honda, Kia, Nissan, Volkswagen |
| 10 | P0340 | Camshaft Position Sensor Circuit Malfunction | BMW, Chevrolet, Chrysler, Ford, Mazda, Mitsubishi, Nissan |
| 9 | P0174 | Fuel System Lean (Bank 2) | BMW, Chevrolet, Dodge, Ford, GMC, Jaguar, Land Rover, Lincoln |
| 9 | P0302 | Cylinder 2 Misfire Detected | Acura, Chrysler, Honda, Kia, Lincoln, Mercedes-Benz, Nissan, Volkswagen, Volvo |
| 8 | P0305 | Cylinder 5 Misfire Detected | Audi, Chrysler, Dodge, Honda, Kia, Lincoln, Volkswagen |
| 8 | P0335 | Crankshaft Position Sensor Circuit Malfunction | Chevrolet, Dodge, Mitsubishi, Nissan |
| 7 | P0401 | Insufficient EGR Flow Detected | Ford, GMC, Lincoln, Mercury |
| 6 | P0306 | Cylinder 6 Misfire Detected | Audi, Chrysler, Honda, Jeep, Mercedes-Benz, Volkswagen |
| 5 | P0122 | TP Sensor Circuit Low Voltage | Buick, Chevrolet, Chrysler, Dodge, Hyundai |
| 5 | P0303 | Cylinder 3 Misfire Detected | Dodge, Ford, Kia, Lincoln, Volvo |
| 4 | P0121 | TP Sensor Performance | Buick, Chevrolet, Dodge, Jeep |
| 4 | P0172 | Fuel System Rich (Bank 1) | Dodge, Ford, Honda, Nissan |
| 4 | P0402 | Excessive EGR Flow Detected | Ford, Lincoln, Mercury |
| 4 | P0411 | Secondary AIR System Incorrect Airflow Detected | Audi, Mercedes-Benz |
| 4 | P0455 | EVAP System Large Leak Detected | Chrysler, Nissan, Saab, Volkswagen |
| 4 | P0606 | Control Module Internal Performance | Buick, Chevrolet, GMC, Toyota |
| 3 | P0101 | MAF Sensor Performance | GMC, Land Rover, Volkswagen |
| 3 | P0102 | MAF Sensor Circuit Low Frequency | Buick, GMC, Volkswagen |
| 3 | P0128 | Engine Coolant Temperature Below Thermostat Regulating Temperature | Chevrolet, Lincoln, Saturn |
| 3 | P0134 | Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Activity | Chevrolet, Saab, Volkswagen |
| 3 | P0141 | Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction | Hyundai, Mitsubishi, Pontiac |
| 3 | P0175 | Fuel System Rich (Bank 2) | Dodge, Ford |
| 3 | P0299 | Turbocharger Engine Underboost | Ford, GMC, Volkswagen |
| 3 | P0336 | Crankshaft Position Sensor Performance | Chevrolet, Land Rover, Pontiac |
| 3 | P0341 | CMP Sensor Performance | Buick, Ford, Mercedes-Benz |
| 3 | P0351 | Ignition Coil 1 Control Circuit Malfunction | Dodge, Ford |
| 3 | P0400 | EGR System Recirculation Flow | Chevrolet, Mazda, Mercedes-Benz |
| 3 | P0420 | Catalyst Efficiency Below Normal (Bank 1) | Mercury, Nissan, Volkswagen |
| 3 | P0505 | Idle Control System Malfunction | BMW, Infiniti, Plymouth |
| 3 | P0601 | Control Module Read Only Memory | Cadillac, Chrysler, Jeep |
| 3 | P1300 | Igniter 1 Circuit Malfunction | Land Rover, Toyota |
| 3 | P1495 | Leak Detection Pump Solenoid Circuit Malfunction | Chrysler, Dodge, Jeep |
| 2 | P0000 | No Self-Diagnostic Malfunction Detected | Chevrolet, Land Rover |
| 2 | P0030 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Control Circuit Malfunction | Hyundai, Pontiac |
| 2 | P0053 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Resistance | GMC, Pontiac |
| 2 | P006A | maf/map correlastion problem | Ford |
| 2 | P0087 | Fuel Rail Pressure Too Low | Chevrolet, GMC |
| 2 | P0093 | Fuel System Large Leak Detected | Chevrolet |
| 2 | P0107 | MAP Sensor Circuit Low Voltage | Dodge, Hyundai |
| 2 | P0118 | ECT Sensor Circuit High Voltage | Buick, Hyundai |
| 2 | P0120 | TP Sensor 1 Signal Circuit Malfunction | Mazda, Mercury |
| 2 | P0123 | TP Sensor Circuit High Voltage | Buick, Dodge |
| 2 | P0129 | Barometric Pressure Sensor Out-Of-Range Low | Dodge, Isuzu |
| 2 | P0130 | Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Malfunction | Lexus, Mercedes-Benz |
| 2 | P0132 | Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit High Voltage | Dodge, Jeep |
| 2 | P0133 | Heated Oxygen Sensor (Bank 1 Sensor 1) Slow Response | Ford, Jeep |
| 2 | P0135 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction | Dodge, Hyundai |
| 2 | P0137 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage | Chevrolet, Ford |
| 2 | P0138 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage | Infiniti, Jeep |
| 2 | P0155 | Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction | Dodge, Nissan |
| 2 | P0173 | Fuel Trim Lean Or Rich (Bank 2) | Ford, Mitsubishi |
| 2 | P0191 | Fuel Rail Pressure Sensor Performance | Ford |
| 2 | P0308 | Cylinder 8 Misfire Detected | Land Rover, Lincoln |
| 2 | P0320 | No Crank Reference Signal To PCM | Chrysler, Dodge |
| 2 | P0344 | Camshaft Position Sensor Signal Intermittent | Chrysler |
| 2 | P0352 | Ignition Coil 2 Control Circuit Malfunction | Chrysler, Dodge |
| 2 | P0404 | EGR Open Position Performance | Dodge, GMC |
| 2 | P0410 | Secondary Air System Performance | Cadillac, Chrysler |
| 2 | P0440 | General EVAP System Failure | Chevrolet, Pontiac |
| 2 | P0442 | EVAP System Small Leak Detected | GMC, Pontiac |
| 2 | P0446 | EVAP Vent System Performance | Chevrolet, Subaru |
| 2 | P0452 | Fuel Tank Pressure Sensor Circuit Low Voltage | Ford, Hyundai |
| 2 | P0500 | Vehicle Speed Sensor Circuit Malfunction | Ford, Jeep |
| 2 | P0506 | Idle Speed Low | Cadillac, Chevrolet |
| 2 | P0705 | Transaxle Range Switch Circuit Malfunction | Buick, Volkswagen |
| 2 | P1121 | TP Sensor Circuit Intermittent High Voltage | Kia, Toyota |
| 2 | P1270 | Engine RPM / Vehicle Speed Limit Reached | Ford |
| 2 | P1320 | Igniter 5 Circuit Malfunction | Nissan |
| 2 | P1391 | CKP Or CMP Sensor Signal Intermittent | Chrysler, Jeep |
| 2 | P1423 | Fuel Tank Large Leak | Audi, BMW |
| 2 | P1457 | EVAP System Leak Detected (Canister Area) | Acura |
| 2 | P2096 | Downstream Fuel System Lean - HO2S-12 (Bank 1 Sensor 2) | Chrysler, Jeep |
| 2 | P2617 | Crankshaft Position Signal Output Circuit Malfunction | Ford |
| 2 | U0107 | Throttle Actuator Control Serial Data Circuit Malfunction | Pontiac |
| 2 | U1000 | Class 2 Communication Malfunction | Chevrolet, Pontiac |
| 2 | U1016 | Serial Communications Malfunction | Buick, Pontiac |
| 2 | U1064 | Lost Communication With BCM or VCD Module | Chevrolet, Pontiac |
| 2 | U1262 | Data Circuit Malfunction | Ford, Lincoln |
| 1 | B1000 | ECU Malfunction | Chevrolet |
| 1 | B1040 | CAN communication fault to engine control module | Mercedes-Benz |
| 1 | B1086 | AAM CAN Com. | Mercedes-Benz |
| 1 | B1302 | Acc. Delay Relay Coil Circuit Fault | Ford |
| 1 | B1313 | Battery Saver Relay Coil Circuit Fault | Ford |
| 1 | B1315 | Battery Saver Relay Coil Short to Battery Positive | Ford |
| 1 | B1318 | Low Battery Voltage At Module | Ford |
| 1 | B1739 | DAS Module fault external EPROMModule replaced | Mercedes-Benz |
| 1 | B1876 | T-Case 2 WD Solenoid Circuit Fault | Ford |
| 1 | B2900 | Vin Mismatch ABS | Lincoln |
| 1 | B2960 | Security system sensor data incorrect but valid | Chevrolet |
| 1 | C1284 | Oil pressure switch Fault | Ford |
| 1 | C1805 | PCM and/or ABS/Tracs control module mismatch | Lincoln |
| 1 | P0010 | Camshaft Position 'A' Actuator Circuit Malfunction (Bank 1) | Chevrolet |
| 1 | P0011 | Intake Camshaft Position System Performance | Nissan |
| 1 | P0036 | Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Control Circuit Malfunction | Pontiac |
| 1 | P0050 | Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Control Circuit Malfunction | Pontiac |
| 1 | P0056 | Heated Oxygen Sensor (Bank 2 Sensor 2) Heater Control Circuit Malfunction | Pontiac |
| 1 | P0065 | Air Assist Injector Solenoid Range/Performance | Jaguar |
| 1 | P0066 | Air Assist Injector Solenoid Circuit Low Voltage | Jaguar |
| 1 | P0068 | Throttle Body Airflow Performance | Pontiac |
| 1 | P0103 | MAF Sensor Circuit High Frequency | Volkswagen |
| 1 | P0106 | MAP Sensor Performance | Chevrolet |
| 1 | P0108 | MAP Sensor Circuit High Voltage | Lincoln |
| 1 | P0113 | IAT Sensor Circuit High Voltage | Buick |
| 1 | P0116 | ECT Sensor Performance | Volkswagen |
| 1 | P0117 | ECT Sensor Circuit Low Voltage | Dodge |
| 1 | P0131 | Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage | Chevrolet |
| 1 | P0136 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Malfunction | Buick |
| 1 | P0140 | Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity | Buick |
| 1 | P0147 | Heated Oxygen Sensor (Bank 1 Sensor 3) Heater Circuit Malfunction | Isuzu |
| 1 | P0151 | Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage | Chevrolet |
| 1 | P0152 | Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit High Voltage | Chrysler |
| 1 | P0154 | Heated Oxygen Sensor (Bank 2 Sensor 1) Insufficient Activity | Chevrolet |
| 1 | P0156 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Malfunction | Toyota |
| 1 | P0170 | Fuel Trim Lean Or Rich (Bank 1) | Hyundai |
| 1 | P0183 | Fuel Tank Temperature Sensor Circuit High Voltage | Ford |
| 1 | P0216 | Injection Timing Control Circuit Malfunction | Dodge |
| 1 | P0232 | Fuel Pump Feedback Circuit High Voltage | Ford |
| 1 | P0251 | Injection Pump Camshaft System | Chevrolet |
| 1 | P0261 | Fuel Injector 1 Control Circuit Low Voltage | Ford |
| 1 | P0281 | Cylinder 7 Balance System Malfunction | Ford |
| 1 | P0307 | Cylinder 7 Misfire Detected | Land Rover |
| 1 | P0316 | Misfire Occurred In First 1,000 Revolutions | Lincoln |
| 1 | P0325 | Knock Sensor Circuit Malfunction | Jeep |
| 1 | P0327 | Knock Sensor Circuit Low Voltage (Bank 1) | Chevrolet |
| 1 | P0330 | Knock Sensor 2 Circuit Malfunction | Ford |
| 1 | P0339 | Crankshaft Position Sensor Signal Intermittent | Dodge |
| 1 | P0349 | Camshaft Position Sensor Circuit Intermittent (Bank 2) | Dodge |
| 1 | P0353 | Ignition Coil 3 Control Circuit Malfunction | Mercury |
| 1 | P0355 | Ignition Coil 5 Control Circuit Malfunction | Ford |
| 1 | P0356 | Ignition Coil 6 Control Circuit Malfunction | Ford |
| 1 | P0380 | Glow Plug Feedback Circuit | Volkswagen |
| 1 | P0394 | Camshaft Position Sensor 1 - Signal Intermittent | Dodge |
| 1 | P0407 | EGR Position Sensor 'B' Circuit Low Voltage | Ford |
| 1 | P040D | EGR Gas Temperature Sensor 1 Circuit High | Ford |
| 1 | P0421 | Warmup Catalyst Efficiency Low (Bank 1) | Mazda |
| 1 | P0429 | Oxygen Sensor (Bank 1 Sensor 2) Heater Performance | Chevrolet |
| 1 | P0441 | EVAP Purge System Performance | Mitsubishi |
| 1 | P0449 | EVAP Vent Solenoid Control Circuit Malfunction | Hyundai |
| 1 | P0460 | Fuel Level Sensing Unit No Change Over Miles | Mazda |
| 1 | P0462 | Fuel Level Sensor Low Voltage | Chevrolet |
| 1 | P0488 | EGR Airflow Throttle Control Circuit Performance | Ford |
| 1 | P0496 | EVAP Canister Purge System High Purge Flow | GMC |
| 1 | P0502 | VSS Circuit Low Input | Buick |
| 1 | P0507 | Idle Speed High | Mitsubishi |
| 1 | P0508 | Idle Air Control Motor Sense Circuit Low Voltage | Dodge |
| 1 | P0513 | Invalid SKIM Key Detected | Dodge |
| 1 | P0602 | Control Module Not Programmed | Ford |
| 1 | P0605 | Control Module Programming Read Only Memory | Volkswagen |
| 1 | P0650 | Malfunction Indicator Lamp Circuit Malfunction | Volvo |
| 1 | P0720 | Output Shaft Speed Sensor Circuit Malfunction | Ford |
| 1 | P0722 | Output Speed Sensor Circuit Low Voltage | Ford |
| 1 | P0730 | Incorrect Gear Ratio | Land Rover |
| 1 | P0741 | TCC System - Stuck Off | Subaru |
| 1 | P0753 | 1-2 Shift Solenoid Circuit Malfunction | Dodge |
| 1 | P0A27 | High Voltage Contactor/Bypass Contactor Stays Activated | Ford |
| 1 | P1020 | MIVEC Performance Problem | Chevrolet |
| 1 | P1086 | Tumble Generator Valve Position Sensor 2 Low Input | Subaru |
| 1 | P1114 | ECT Sensor Circuit Intermittent Low Voltage | Volkswagen |
| 1 | P1115 | ECT Sensor Circuit Intermittent High Voltage | Kia |
| 1 | P1120 | TP Sensor 1 Circuit Malfunction | Toyota |
| 1 | P1122 | TP Sensor Circuit Intermittent Low Voltage | Nissan |
| 1 | P1125 | Accelerator Pedal Position System Malfunction | Chevrolet |
| 1 | P1133 | Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching | Buick |
| 1 | P1174 | Fuel Trim Cylinder Balance | Saturn |
| 1 | P1192 | Intake Air Temperature Sensor Circuit Low Voltage | Dodge |
| 1 | P1230 | Low Speed Fuel Pump Malfunction | Saab |
| 1 | P127A | Starter Control Circuit 2 Over Current (TIPM) | Ford |
| 1 | P1286 | Accelerator Pedal Position Sensor 3 Performance | Dodge |
| 1 | P1309 | Misfire Detection Monitor | Ford |
| 1 | P132B | Turbo boost control A performance | Ford |
| 1 | P1336 | CKP Sensor System Variation Not Learned | Nissan |
| 1 | P1338 | Bank 1 cam position sensor short | Audi |
| 1 | P1345 | Camshaft To Crankshaft Position Correlation | Mazda |
| 1 | P1350 | Bypass Line Monitor Circuit Malfunction | Buick |
| 1 | P1361 | ICM Ignition Control Circuit Low Voltage | Buick |
| 1 | P1378 | FICM Supply Voltage Low Voltage | Ford |
| 1 | P1388 | Auto Shutdown Relay Control Circuit Malfunction | Jeep |
| 1 | P1393 | 'G' Sensor Rough Road High Voltage | Volkswagen |
| 1 | P1399 | Misfire any cylinder | Honda |
| 1 | P1400 | Cold Start Emission Reduction Control System | Chevrolet |
| 1 | P1406 | EGR Valve Pintle Position Circuit Malfunction | Buick |
| 1 | P1408 | EGR Flow Out Of Self-Test Range | Mercury |
| 1 | P1411 | Cylinder 1 Reactivation Control Performance | Audi |
| 1 | P1421 | Cold Start Emission Reduction Strategy Monitoring | BMW |
| 1 | P1441 | EVAP System Flow During Non-Purge Conditions | Nissan |
| 1 | P1443 | Secondary Air Injection System Control Valve Circuit Malfunction (Bank 2) | Ford |
| 1 | P1456 | EVAP System Leak Detected (Fuel Tank Area) | Nissan |
| 1 | P1464 | Fuel Level Sensor Circuit High Voltage | Mazda |
| 1 | P1471 | Manufacturer Code | Land Rover |
| 1 | P1472 | Evap leak detection pump short to ground | Land Rover |
| 1 | P1488 | Auxiliary 5-Volt Supply Too Low | Nissan |
| 1 | P1491 | EVAP Vacuum Cut Valve/Bypass Circuit Malfunction | Nissan |
| 1 | P1510 | PCM Backup Power Supply Circuit Malfunction | Subaru |
| 1 | P1512 | Control Module Throttle Actuator Position Performance | Subaru |
| 1 | P1514 | Throttle Body Performance | Subaru |
| 1 | P1515 | Control Module Throttle Actuator Position Performance | Subaru |
| 1 | P1516 | TAC Module Throttle Actuator Position Performance | Chevrolet |
| 1 | P1545 | Air Conditioning Clutch Relay Control Circuit Malfunction | Volkswagen |
| 1 | P1550 | Battery Current Sensor Range/Performance | Volkswagen |
| 1 | P1555 | Electronic Variable Orifice Solenoid Malfunction | Volkswagen |
| 1 | P1556 | Battery Module Temperature Sensor Signal 2 Circuit High Voltage | Volkswagen |
| 1 | P1562 | PCM +BB Voltage Low | Volkswagen |
| 1 | P1570 | Laser Radar Sensor Circuit Malfunction | Mercedes-Benz |
| 1 | P1599 | A/C Pressure Sensor Circuit Low Voltage | Cadillac |
| 1 | P1601 | PCM Serial Communications Malfunction | Chevrolet |
| 1 | P1612 | NATS CHAIN OF IMMU-PCM | Volkswagen |
| 1 | P1626 | Theft Deterrent Fuel Enable Signal Lost | GMC |
| 1 | P1629 | Theft Deterrent Signal Not Present, Engine Cranking | Chevrolet |
| 1 | P1631 | Theft Deterrent Fuel Enable Signal Not Correct | Chevrolet |
| 1 | P1649 | ABS Operation Signal Circuit Malfunction | Jaguar |
| 1 | P1693 | Transponder No Response Error / Invalid Response | Kia |
| 1 | P1695 | No CCD Messages Received From BCM | Chrysler |
| 1 | P1700 | TCM Requested MIL Operation | Mercedes-Benz |
| 1 | P1703 | Brake Switch Circuit Malfunction (Self Test) | Hyundai |
| 1 | P1705 | Throttle Position Sensor Circuit Malfunction | Mercury |
| 1 | P1747 | EPC Solenoid Circuit Malfunction | Ford |
| 1 | P1755 | Linear Solenoid For Line Pressure Circuit Malfunction | Dodge |
| 1 | P1765 | Switched Battery Malfunction | Dodge |
| 1 | P1A10 | Hybrid Battery 1 Temperature Sensor Performance | Ford |
| 1 | P2002 | Diesel Particulate Filter Efficiency | Ford |
| 1 | P2008 | Intake Manifold Runner (Swirl) Control Circuit / Open | Mercedes-Benz |
| 1 | P2088 | Camshaft Position Actuator Circuit Low (Bank 1) | Mercedes-Benz |
| 1 | P2101 | Control Module Throttle Actuator Position Performance | Saturn |
| 1 | P2110 | Electronic Throttle Control - Forced Limited RPM | Chrysler |
| 1 | P2118 | Electronic Throttle Control - Motor Current Performance | Chrysler |
| 1 | P2119 | Throttle Closed Position Performance | Buick |
| 1 | P2120 | Accelerator Pedal Position Sensor 1 Circuit Malfunction | Chevrolet |
| 1 | P2128 | Accelerator Pedal Position Sensor 2 Circuit High Voltage | Dodge |
| 1 | P2135 | Throttle Position Sensor 1-2 Correlation Error | Cadillac |
| 1 | P2196 | Heated Oxygen Sensor (Bank 1 Sensor 1) Stuck Rich | Hyundai |
| 1 | P2197 | Air Fuel Ratio Sensor (Bank 2 Sensor 1) Signal Stuck "Lean" | Ford |
| 1 | P2237 | Air Fuel Sensor 1 (Bank 1 Sensor 1) Pumping Current Signal Open | Hyundai |
| 1 | P2240 | Air Fuel Ratio Sensor (Bank 2 Sensor 1) Pumping Current Signal Open | BMW |
| 1 | P2271 | Heated Oxygen Sensor (Bank 1 Sensor 2) Signal Stuck Rich | Hyundai |
| 1 | P2290 | Injector Control Pressure Too Low | Ford |
| 1 | P2291 | Injector Control Pressure Too Low - Engine Cranking | Ford |
| 1 | P2614 | Camshaft Position Output Circuit Malfunction | Ford |
| 1 | P3090 | Lower Rail Pressure threshold value undershot | BMW |
| 1 | P3138 | Collision Sensor High Input | Audi |
| 1 | U0181 | comm ecm | Pontiac |
| 1 | U1014 | loss of ebcm communication | Buick |
| 1 | U1027 | SCP Data Fault engine RPM | Ford |
| 1 | U1040 | Lost Communication With Antilock Brake System Module | Pontiac |
| 1 | U1041 | Loss of Electronic Brake Controller Communication | Chevrolet |
| 1 | U1059 | Egr insufficient flow | Lincoln |
| 1 | U1073 | Data Circuit Message | Lincoln |
| 1 | U1123 | Scpinvalid for odometer | Lincoln |
| 1 | U1300 | Class 2 Data Line Short To Ground | Buick |
| 1 | U1301 | Class 2 Data Line Short To Voltage | Pontiac |
| 1 | U1B00 | unknown | Saturn |
| 1 | U1B07 | unknown | Saturn |
| 1 | U2106 | ECM - No Communication With Transmission Control Module | Pontiac |
| 1 | U2107 | Lost Communication With Body Control System | Pontiac |
