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Home >> Buick >> 2002 >> Century Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.1L Engine >> Diagnostic Trouble Code Definitions
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Diagnostic Trouble Code Definitions

NOTE: DTCs are retrieved using a Tech 2 scan tool, or other OBD-II compatible scan tool connected to OBD-II 16-pin Data Link Connector (DLC).
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Definition (1) Type
BXXXX Body Control System Malfunction (2)
CXXXX Chassis Control System Malfunction (2)
P0030  HO2S Heater Control Circuit (Sensor 1) B
P0101  MAF Sensor Performance B
P0102  MAF Sensor Circuit - Low Voltage B
P0103  MAF Sensor Circuit - High Voltage B
P0107  MAP Sensor Circuit - Low Voltage B
P0108  MAP Sensor Circuit - High Voltage B
P0112  IAT Sensor Circuit - Low Voltage B
P0113  IAT Sensor Circuit - High Voltage B
P0116  ECT Sensor Circuit Performance B
P0117  ECT Sensor Circuit - Low Voltage B
P0118  ECT Sensor Circuit - High Voltage B
P0121  TP Sensor Performance B
P0122  TP Sensor Circuit - Low Voltage B
P0123  TP Sensor Circuit - High Voltage B
P0125  ECT Excessive Time To Enter Closed Loop B
P0128  Engine Coolant Thermostat B
P0130  HO2S Circuit (Sensor 1) B
P0131  HO2S Circuit - Low Voltage (Bank 1; Sensor 1) B
P0132  HO2S Circuit - High Voltage B
P0133  HO2S Slow Response B
P0134  HO2S Circuit Insufficient Activity B
P0135  HO2S Heater Performance B
P0137  HO2S Circuit - Low Voltage B
P0138  HO2S Circuit - High Voltage B
P0140  HO2S Circuit Insufficient Activity (Bank 1; Sensor 2) B
P0141  HO2S Heater Performance (Bank 1; Sensor 2) B
P0171  Lean Fuel Trim System (Bank 1) B
P0172  Rich Fuel Trim System (Bank 1) B
P0201-P0206  Injector Control Circuit B
P0218 (3) Transmission Over Temperature Condition B
P0230  Fuel Pump Primary Circuit C
P0300  Engine Misfire Detected B
P0325  Knock Sensor Module Circuit B
P0327  KS Circuit - Low Voltage (Bank 1) B
P0336  CKP Sensor Circuit Performance B
P0341  CMP Sensor Circuit Performance B
P0401  EGR System A
P0403  EGR Solenoid Control Circuit A
P0404  EGR System B
P0405  EGR Sensor Circuit - Low Voltage B
P0420  TWC System Low Efficiency (Bank 1) B
P0440  EVAP System B
P0442  EVAP System - Leak Detected A
P0443  EVAP Purge Solenoid Control Circuit B
P0446  EVAP Canister Vent Blocked B
P0449  EVAP Canister Vent Solenoid Control Circuit B
P0452  Fuel Tank Pressure Sensor Circuit - Low Voltage B
P0453  Fuel Tank Pressure Sensor Circuit - High Voltage B
P0462 (4) Fuel Level Circuit Low Voltage C
P0463 (4) Fuel Level Circuit - High Voltage C
P0480 Cooling Fan No. 1 Control Circuit B
P0481 Cooling Fan No. 2 Control Circuit B
P0502 (3) VSS Circuit Low Input B
P0503 (3) VSS Circuit Performance B
P0506  Idle Speed - Low B
P0507  Idle Speed - High B
P0530 (5) A/C Refrigerant Pressure Sensor Circuit C
P0560 (6) System Voltage C
P0601-P0607, P1600, P1621, P1627, P1680, P1681 Or P1683  Control Module Read Only Memory (7) A
P0620 (6) Generator Control Circuit C
P0650  MIL Control Circuit (Century & Grand Prix) B
P0650  MIL Control Circuit (Malibu) B
P0711(3) TFT Sensor Out Of Range C
P0712 (3) TFT Sensor Circuit - Low Voltage C
P0713 (3) TFT Sensor Circuit - High Voltage C
P0716 (3) Input Turbine Speed Sensor Circuit Performance B
P0717 (3) Input Turbine Speed Sensor Circuit - No Signal B
P0719 (3) Brake Switch 2 Circuit - Low Voltage C
P0724 (3) Brake Switch 2 Circuit - High Voltage C
P0730 (3) Incorrect Gear Ratio C
P0741(3) TCC Circuit Performance Or Stuck Off B
P0742 (3) TCC Circuit Stuck On A
P0748 (3) Pressure Control Solenoid Electrical C
P0751 (3) Shift Solenoid 1 Performance Or Stuck Off B
P0752 (3) 1-2 Shift Solenoid Stuck On B
P0753 (3) Shift Solenoid 1 Electrical B
P0756 (3) Shift Solenoid 2 Performance Or Stuck Off A
P0757 (3) 2-3 Shift Solenoid Stuck On A
P0758 (3) Shift Solenoid 2 Electrical A
P1106  MAP Sensor Circuit Intermittent High Voltage C
P1107  MAP Sensor Circuit Intermittent Low Voltage C
P1111  IAT Sensor Circuit Intermittent High Voltage C
P1112  IAT Sensor Circuit Intermittent Low Voltage C
P1114  ECT Sensor Circuit Intermittent Low Voltage C
P1115  ECT Sensor Circuit Intermittent High Voltage C
P1121  TP Sensor Circuit Intermittent High Voltage C
P1122  TP Sensor Circuit Intermittent Low Voltage C
P1133  HO2S Insufficient Switching (Bank 1; Sensor 1) B
P1134  HO2S Transition Time Ratio (Bank 1; Sensor 1) B
P1189 (4) Engine Oil Pressure Switch Circuit C
P1336  Crankshaft Position System Variation Not Learned A
P1351  IC Circuit High Voltage B
P1352  IC Output High/Pulse Detected When Gnd_Cyl. 2 B
P1361  IC Circuit Low Voltage B
P1362  IC Cylinder No. 2 Not Toggling After Enable B
P1374  3X Reference Circuit B
P1380  EBTCM DTC Detected Rough Road Data Unusable C
P1381  Misfire Detected No EBTCM/PCM Serial Data C
P1404  EGR System (Valve No. 2) B
P1441  EVAP System Flow During Non-Purge B
P1546 (5) A/C Clutch Status Circuit - Low Voltage C
P1554 (8) Cruise Engaged Circuit - High Voltage C
P1585 (8) Cruise Inhibit Control Circuit C
P1626 (9) Theft Deterrent System Fuel Enable Circuit C
P1630 (9) Theft Deterrent System - PCM In Learn Mode C
P1631 (9) Theft Deterrent System - Password Incorrect C
P1635  5-Volt Reference Low B
P1639   
5-Volt Reference 2 Circuit		 B
P1640  Driver 1 Input - High Voltage C
P1650  Driver 2 Input - High Voltage C
P1660  Cooling Fans Control Circuit C
P1670  Output Driver Module No. 4 C
P1810 (3) Pressure Switch Manifold B
P1811(3) Maximum Adapt & Long Shift C
P1814 (3) Torque Converter Overstressed C
P1860 (3) TCC PWM Solenoid Circuit B
P1887 (3) TCC Release Switch Circuit B
(1) See appropriate CODE TYPES under ON-BOARD DIAGNOSTICS in SELF-DIAGNOSTIC SYSTEM.
(2) For a complete listing of body and chassis codes, see appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
(3) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(4) See appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
(5) See appropriate A/C-HEATER SYSTEMS article in appropriate AIR CONDITIONING & HEATING.
(6) See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
(7) DTC P1683 is a code type "B".
(8) See appropriate CRUISE CONTROL article in ACCESSORIES & EQUIPMENT.
(9) See appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT.
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