Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2000 Pontiac Firebird Formula, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Performance 3.8L DTCS
ENGINE PERFORMANCE 3.8L DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Definition |
|---|---|
| P0102 | MAF Sensor Circuit - Low Frequency |
| P0103 | MAF Sensor Circuit - High Frequency |
| P0107 | MAP Sensor Circuit - Low Voltage |
| P0108 | MAP Sensor Circuit - High Voltage |
| P0112 | IAT Sensor Circuit - Low Voltage |
| P0113 | IAT Sensor Circuit - High Voltage |
| P0117 | ECT Sensor Circuit - Low Voltage |
| P0118 | ECT Sensor Circuit - High Voltage |
| P0121 | TP Sensor Performance |
| P0122 | TP Sensor Circuit - Low Voltage |
| P0123 | TP Sensor Circuit - High Voltage |
| P0125 | ECT Excessive Time To Enter Closed Loop Fuel Control |
| P0128 | ECT Less Than Thermostat Regulating Temperature |
| P0131 | HO2S Circuit Low Voltage - Bank 1, Sensor 1 |
| P0132 | HO2S Circuit High Voltage - Bank 1, Sensor 1 |
| P0133 | HO2S Slow Response - Bank 1, Sensor 1 |
| P0134 | HO2S Circuit Insufficient Activity - Bank 1, Sensor 1 |
| P0135 | HO2S Heater Performance - Bank 1, Sensor 1 |
| P0137 | HO2S Circuit Low Voltage - Bank 1, Sensor 2 |
| P0138 | HO2S Circuit High Voltage - Bank 1, Sensor 2 |
| P0140 | HO2S Circuit Insufficient Activity - Bank 1, Sensor 2 |
| P0141 | HO2S 2 Heater Performance - Bank 1, Sensor 2 |
| P0151 | HO2S Circuit Low Voltage - Bank 2, Sensor 1 |
| P0152 | HO2S Circuit High Voltage - Bank 2, Sensor 1 |
| P0153 | HO2S Circuit Slow Response - Bank 2, Sensor 1 |
| P0154 | HO2S Circuit Insufficient Activity - Bank 2, Sensor 1 |
| P0155 | HO2S Heater Performance - Bank 2, Sensor 1 |
| P0171 | Fuel Trim System Lean - Bank 1 |
| P0172 | Fuel Trim System Rich - Bank 1 |
| P0174 | Fuel Trim System Lean - Bank 2 |
| P0175 | Fuel Trim System Rich - Bank 2 |
| P0201 | Injector No. 1 Control Circuit |
| P0202 | Injector No. 2 Control Circuit |
| P0203 | Injector No. 3 Control Circuit |
| P0204 | Injector No. 4 Control Circuit |
| P0205 | Injector No. 5 Control Circuit |
| P0206 | Injector No. 6 Control Circuit |
| P0230 | Fuel Pump Relay Control Circuit |
| P0300 | Engine Misfire Detected |
| P0325 | Knock Sensor Module Circuit |
| P0327 | Knock Sensor Circuit - Bank 1 |
| P0332 | Knock Sensor Circuit - Bank 2 |
| P0336 | Crankshaft Position (CKP) Sensor Circuit |
| P0341 | Camshaft Position (CMP) Sensor Performance |
| P0401 | EGR System Insufficient Flow |
| P0403 | EGR Solenoid Control Circuit |
| P0404 | EGR Open Position Performance |
| P0405 | EGR Position Sensor Circuit - Low Voltage |
| P0420 | Catalyst System Low Efficiency |
| P0440 | EVAP System |
| P0442 | EVAP Control System Small Leak Detected |
| P0443 | EVAP Purge Solenoid Control Circuit |
| P0446 | EVAP Vent System Performance |
| P0449 | EVAP Canister Vent Solenoid Valve Control Circuit |
| P0452 | Fuel Tank Pressure Sensor Circuit - Low Voltage |
| P0453 | Fuel Level Pressure Sensor Circuit - High Voltage |
| P0462 | Fuel Level Sensor Circuit - Low Voltage |
| P0463 | Fuel Level Sensor Circuit - High Voltage |
| P0480 | Cooling Fan Relay No. 1 Control Circuit |
| P0481 | Cooling Fan Relay No. 2 & 3 Control Circuit |
| P0500 | Vehicle Speed Sensor (VSS) Circuit |
| P0506 | Idle Speed RPM Low |
| P0507 | IAC System RPM High |
| P0530 | A/C Refrigerant Pressure Sensor Circuit |
| P0560 | System Voltage |
| P0567 | Cruise Control Resume Switch Circuit |
| P0568 | Cruise Control Set Switch Circuit |
| P0571 | Cruise Control Brake Switch Circuit |
| P0601 | Control Module Read Only Memory (ROM) |
| P0602 | Control Module Not Programmed |
| P0604 | Control Module Random Access Memory (RAM) |
| P0606 | Control Module Internal Performance |
| P0620 | Generator Performance |
| P0650 | Malfunction Indicator Light (MIL) Control Circuit |
| P0704 | Clutch Switch Circuit |
| P1106 | MAP Sensor Circuit Intermittent - High Voltage |
| P1107 | MAP Sensor Circuit Intermittent - Low Voltage |
| P1111 | IAT Sensor Circuit Intermittent High Voltage |
| P1112 | IAT Sensor Circuit Intermittent Low Voltage |
| P1114 | ECT Sensor Circuit Intermittent Low Voltage |
| P1115 | ECT Sensor Circuit Intermittent High Voltage |
| P1120 | TP Sensor No. 1 Circuit |
| P1125 | Accelerator Pedal Position (APP) System |
| P1133 | HO2S Insufficient Switching - Bank 1, Sensor 1 |
| P1134 | HO2S Transition Time Ratio - Bank 1, Sensor 1 |
| P1153 | HO2S Insufficient Switching - Bank 2, Sensor 1 |
| P1154 | HO2S Transition Time Ratio - Bank 2, Sensor 1 |
| P1220 | Throttle Position Sensor No. 2 Circuit |
| P1221 | Throttle Position Sensor No. 1 & 2 Correlation |
| P1271 | APP Sensors No. 1 & 2 Correlation |
| P1272 | APP Sensors No. 2 & 3 Correlation |
| P1273 | APP Sensors No. 1 & 3 Correlation |
| P1275 | APP Sensor No. 1 Circuit |
| P1276 | APP Sensor No. 1 Performance |
| P1280 | APP Sensor No. 2 Circuit |
| P1281 | APP Sensor No. 2 Performance |
| P1285 | APP Sensor No. 3 Circuit |
| P1286 | APP Sensor No. 3 Performance |
| P1336 | CKP System Variation Not Learned |
| P1351 | Ignition Control (IC) Circuit - High Voltage |
| P1352 | Ignition By-Pass Circuit - High Voltage |
| P1361 | Ignition Control (IC) Circuit - Low Voltage |
| P1362 | Ignition By-Pass Circuit - Low Voltage |
| P1374 | Crankshaft Position (CKP) High-To-Low Resolution Frequency Correlation |
| P1380 | Misfire Detected - Rough Road Data Not Available |
| P1381 | Misfire Detected - No Communication With Brake Control Module |
| P1404 | EGR Closed Position Performance |
| P1441 | EVAP System Flow During Non-Purge |
| P1515 | Control Module Throttle Actuator Position Performance |
| P1516 | Throttle Actuator Control (TAC) Module - Throttle Actuator Position Performance |
| P1517 | Throttle Actuator Control (TAC) Module Performance |
| P1518 | Throttle Actuator Control (TAC) Module Serial Data Circuit |
| P1519 | Throttle Actuator Control (TAC) Module Internal Circuit |
| P1523 | Throttle Closed Position Performance |
| P1546 | A/C Clutch Relay Control Circuit |
| P1554 | Cruise Control Feedback Circuit |
| P1571 | Traction Control System (TCS) Torque Request Circuit |
| P1574 | Stoplight Switch Circuit |
| P1586 | Cruise Control Brake Switch No. 2 Circuit |
| P1626 | Theft Deterrent Fuel Enable Signal Lost |
| P1629 | Theft Deterrent Fuel Enable Signal Not Received |
| P1635 | 5-Volt Reference No. 1 Circuit ( |
| P1639 | 5-Volt Reference No. 2 Circuit |
| P1689 | Traction Control Delivered Torque Output Circuit |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.