LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 2001 >> Firebird Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Trouble Code Definitions
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Definitions

NOTE: Use of Tech 2 scan tool is required to retrieve DTCs. Refer to user reference manual supplied with scan tool.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC (1) Definition (2) Code Type
BXXXX (3) Body Control DTC N/A
CXXXX (4) Brake/Chassis DTC N/A
P0101  Mass Airflow Sensor Performance B
P0102  Mass Airflow Sensor Circuit Low Frequency B
P0103  Mass Airflow Sensor Circuit High Frequency B
P0107  Manifold Absolute Pressure Sensor Circuit Low Voltage B
P0108  Manifold Absolute Pressure Sensor Circuit High Voltage B
P0112  Intake Air Temperature Sensor Circuit Low Voltage B
P0113  Intake Air Temperature Sensor Circuit High Voltage B
P0117  Engine Coolant Temperature Sensor Circuit Low Voltage B
P0118  Engine Coolant Temperature Sensor Circuit High Voltage B
P0125  Engine Coolant Temperature Excessive Time To Enter Closed Loop Fuel Control B
P0128  Engine Coolant Temperature Excessive Time To Reach Operating Temperature B
P0130  HO2S Circuit Malfunction - Bank 1, Sensor 1 B
P0131  HO2S Circuit Voltage Low - Bank 1, Sensor 1 B
P0132  HO2S Circuit Voltage High - Bank 1, Sensor 1 B
P0133  HO2S Slow Response - Bank 1, Sensor 1 B
P0134  HO2S Circuit Insufficient Activity - Bank 1, Sensor 1 B
P0135  HO2S Heater Performance - Bank 1, Sensor 1 B
P0137  HO2S Circuit Low Voltage - Bank 1, Sensor 2 B
P0138  HO2S Circuit High Voltage - Bank 1, Sensor 2 B
P0140  HO2S Circuit Insufficient Activity - Bank 1, Sensor 2 B
P0141  HO2S Heater Performance - Bank 1, Sensor 2 B
P0150  HO2S Circuit Malfunction - Bank 2, Sensor 1 B
P0151  HO2S Circuit Voltage Low - Bank 2, Sensor 1 B
P0152  HO2S Circuit Voltage High - Bank 2, Sensor 1 B
P0153  HO2S Slow Response - Bank 2, Sensor 1 B
P0154  HO2S Circuit Insufficient Activity - Bank 2, Sensor 1 B
P0155  HO2S Heater Performance - Bank 2, Sensor 1 B
P0171  Fuel Trim System Lean - Bank 1 B
P0172  Fuel Trim System Rich - Bank 1 B
P0174  Fuel Trim System Lean - Bank 2 B
P0175  Fuel Trim System Rich - Bank 2 B
P0201-P0206  Injector Control Circuit B
P0218 (5) Transmission Fluid Overtemperature C
P0230  Fuel Pump Relay Control Circuit B
P0241 (4) Pulse Width Modulated Signal Circuit Malfunction C
P0300  Engine Misfire Detected B
P0325  Knock Sensor Module Performance B
P0327  Knock Sensor No. 1 Circuit B
P0332  Knock Sensor No. 2 Circuit B
P0336  Crankshaft Position Sensor 18X Reference Circuit Malfunction B
P0341  Camshaft Position Sensor Out Of Range B
P0401  Insufficient EGR Flow A
P0403  EGR Control Circuit Malfunction A
P0404  EGR Valve Desired Position Not Met A
P0405  EGR Position Sensor Signal Voltage Excessively Low A
P0420  Catalyst System Low Efficiency A
P0440  Evaporative Emission (EVAP) System A
P0442  Evaporative Emission (EVAP) System Small Leak Detected A
P0443  Evaporative Emission (EVAP) Purge Solenoid Control Circuit B
P0446  Evaporative Emission (EVAP) Vent System Performance A
P0449  EVAP Canister Vent Solenoid Valve Control Circuit B
P0452  Fuel Tank Pressure Sensor Circuit Low Voltage B
P0453  Fuel Tank Pressure Sensor Circuit High Voltage B
P0462 (6) Fuel Level Sensor Circuit Low Voltage C
P0463 (6) Fuel Level Sensor Circuit High Voltage C
P0480  Cooling Fan Relay No. 1 Control Circuit B
P0481  Cooling Fan Relays No. 2 & 3 Control Circuit B
P0500 (5) Vehicle Speed Sensor Circuit B
P0502 (5) Vehicle Speed Sensor Signal Out Of Range B
P0503 (5) Vehicle Speed Sensor Malfunction B
P0506  Idle Speed Low B
P0507  Idle Speed High B
P0530  A/C Refrigerant Pressure Sensor Circuit C
P0560 (7) System Voltage Out Of Range C
P0562 (7) System Voltage Low C
P0563 (7) System Voltage High C
P0567 (8) Resume/Accel Switch Signal Malfunction C
P0568 (8) Set/Coast Switch Signal Malfunction C
P0571 (8) Cruise Control Release Switch Circuit Failure C
P0601  PCM Internal Malfunction A
P0602  PCM Internal Malfunction A
P0604  PCM Internal Malfunction A
P0606  PCM Internal Malfunction A
P0615 (7) Starter Enable Circuit Malfunction C
P0620 (7) Fault Detection Circuit Malfunction C
P0650  Malfunction Indicator Light (MIL) Control Circuit B
P0704 (8), (9) Clutch Switch Circuit B
P0711 (5) Transmission Fluid Temperature Sensor Malfunction C
P0712 (5) Transmission Fluid Temperature Sensor Circuit Low Input C
P0713 (5) Transmission Fluid Temperature Sensor Circuit High Input C
P0719 (5) TCC Brake Switch Signal Low C
P0724 (5) TCC Brake Switch Signal High C
P0740 (5) TCC Solenoid Valve Circuit Malfunction B
P0742 (5) TCC Malfunction B
P0748 (5) Pressure Control Solenoid Circuit Malfunction C
P0751 (5) 2-2-3-3 Shift Pattern Detected B
P0752 (5) 1-1-4-4 Shift Pattern Detected B
P0753 (5) 1-2 Shift Solenoid Circuit Malfunction B
P0756 (5) 4-3-3-4 Shift Pattern Detected A
P0757 (5) 1-2-2-1 Shift Pattern Detected A
P0758 (5) 2-3 Shift Solenoid Circuit Malfunction A
P0785 (5) 3-2 Shift Solenoid Circuit Malfunction B
P0801 (5) Reverse Inhibit Solenoid Control Circuit C
P0803 (5) Skip Shift Solenoid Control Circuit B
P1106  Manifold Absolute Pressure Sensor Circuit High Voltage C
P1107  Manifold Absolute Pressure Sensor Circuit Low Voltage C
P1112  Intake Air Temperature Sensor Circuit Intermittent Low Voltage C
P1114  Engine Coolant Temperature Sensor Circuit Intermittent Low Voltage C
P1115  Engine Coolant Temperature Sensor Circuit Intermittent High Voltage C
P1120  Throttle Position Sensor Voltage Out Of Range A
P1125  Accelerator Pedal Position Sensors Out Of Range A
P1133  HO2S Insufficient Switching - Bank 1, Sensor 1 B
P1134  HO2S Transition Time Ratio - Bank 1, Sensor 1 B
P1153  HO2S Insufficient Switching - Bank 2, Sensor 1 B
P1154  HO2S Transition Time Ratio - Bank 2, Sensor 1 B
P1220  Throttle Position Sensor Voltage Out Of Range A
P1221  Throttle Position Sensor 1 & 2 Disagree A
P1271  Accelerator Pedal Position Sensor 1 & 2 Signals Shorted Together C
P1272  Accelerator Pedal Position Sensor 1 & 3 Signals Shorted Together C
P1273  Accelerator Pedal Position Sensor 2 & 3 Signals Shorted Together C
P1275  Accelerator Pedal Position Sensor 1 Signal Out Of Range C
P1276  Accelerator Pedal Position Sensor 1 Disagrees With Sensors 2 & 3 C
P1280  Accelerator Pedal Position Sensor 2 Signal Out Of Range C
P1281  Accelerator Pedal Position Sensor 2 Disagrees With Sensors 1 & 3 C
P1285  Accelerator Pedal Position Sensor 3 Signal Out Of Range C
P1286  Accelerator Pedal Position Sensor 3 Disagrees With Sensors 1 & 2 C
P1336  Crankshaft Position System Variation Not Learned A
P1351  PCM Detects Open In Ignition Control Circuit B
P1352  PCM Detects Open In Ignition Control Circuit B
P1361  PCM Does Not Monitor Ignition Control Pulses B
P1362  PCM Detects Short To Voltage In Ignition Control Timing Signal Circuit B
P1374  Crankshaft Position Sensor 3X Reference Circuit Malfunction B
P1380  Misfire Detected - Rough Road Data Not Available C
P1381  Misfire Detected - No Communication With Brake Control Module C
P1441  EVAP System Flow During Non-Purge B
P1514  Actual MAF & Speed Density Is Greater Than Expected A
P1515  Commanded & Actual Throttle Position Mismatch A
P1516  Commanded & Actual Throttle Position Malfunction A
P1517  Throttle Actuator Control Module Internal Malfunction A
P1518  Loss Of Communication Between PCM & TAC Module A
P1519  Throttle Position Sensor 1 Out Of Range C
P1523  Commanded & Actual Throttle Position Mismatch C
P1546  A/C Clutch Feedback Circuit Low Voltage C
P1571 (4) Pulse Width Modulated Signal Circuit Malfunction C
P1574 (8) Sudden Decrease In Vehicle Speed On Non-Drive Wheel C
P1586 (8) Cruise Inhibit Signal Circuit Malfunction C
P1626 (10) Theft Deterrent System Fuel Enable Circuit Lost C
 
P1629 (10) Theft Deterrent System Fuel Enable Circuit Malfunction C
 
P1635  5-Volt Reference 1 Circuit B
P1639  5-Volt Reference 2 Circuit B
P1810 (5) Invalid TFP Manual Valve Position Switch State B
P1860 (5) TCC PWM Solenoid Valve Circuit Malfunction B
P1870 (5) Excessive TCC Slip When Engaged B
UXXXX (3) Scan Tool Does Not Communicate With Class 2 Device
(1) DTC definitions may vary depending on vehicle and/or engine configuration.
(2) For code type definitions, see CODE TYPES  under SELF-DIAGNOSTIC SYSTEM.
(3) See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
(4) See appropriate ANTI-LOCK article in BRAKES.
(5) See appropriate ELECTRONIC CONTROLS article in TRANSMISSIONS.
(6) See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
(7) See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
(8) See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
(9) See BORG-WARNER T56 6-SPEED ELECTRONIC CONTROLS article in MANUAL TRANSMISSIONS.
(10) See appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT.
scientia non olet · About LEMON Manuals