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 Oldsmobile BravadaFACTORY OEM SERVICE PROCEDURE
Engine Controls Self-Diagnostics - 4.3L
- Model Identification
- Introduction
- Self-Diagnostic System
- Description
- Scan Tool Display
- Diagnostic Procedure
- Retrieving Diagnostic Trouble Codes
- On-Board Diagnostic System Check
- Malfunction Indicator Light Circuit Check
- Data Link Connector Diagnosis Or No Scan Tool Data
- Diagnostic Trouble Code Definition
- Hard Or Intermittent Trouble Code Determination
- Clearing Diagnostic Trouble Codes
- Vehicle Control Module Location
- Diagnostic Materials
- Special Tools (Diagnostic)
- Scan Tool Usage
- Summary
- Diagnostic Tests
- Notes
- DTC P0101: Mass Airflow System Performance
- DTC P0102: Mass Airflow Sensor Circuit - Low Frequency
- DTC P0103: Mass Airflow Sensor Circuit - High Frequency
- DTC P0106: Manifold Absolute Pressure System Performance
- DTC P0107: Manifold Absolute Pressure Sensor Circuit - Low Voltage
- DTC P0108: Manifold Absolute Pressure Sensor Circuit - High Voltage
- DTC P0112: Intake Air Temperature Sensor Circuit - Low Voltage
- DTC P0113: Intake Air Temperature Sensor Circuit - High Voltage
- DTC P0117: Engine Coolant Temperature Sensor Circuit - Low Voltage
- DTC P0118: Engine Coolant Temperature Sensor Circuit - High Voltage
- DTC P0121: Throttle Position Sensor Performance
- DTC P0122: Throttle Position Sensor Circuit - Low Voltage
- DTC P0123: Throttle Position Sensor Circuit - High Voltage
- DTC P0125: Engine Coolant Temperature Excessive Time To Enter Closed Loop Fuel Control
- DTC P0131: Heated Oxygen Sensor No. 1 Circuit - Low Voltage (Bank 1)
- DTC P0132: Heated Oxygen Sensor No. 1 Circuit - High Voltage (Bank 1)
- DTC P0133: Heated Oxygen Sensor No. 1 Circuit - Slow Response (Bank 1)
- DTC P0134: Heated Oxygen Sensor No. 1 Circuit - Insufficient Activity (Bank 1)
- DTC P0135: Heated Oxygen Sensor No. 1 Heater Circuit (Bank 1)
- DTC P0143: Heated Oxygen Sensor No. 3 Circuit - Low Voltage (Bank 1)
- DTC P0144: Heated Oxygen Sensor No. 3 Circuit - High Voltage (Bank 1)
- DTC P0146: Heated Oxygen Sensor No. 3 Circuit - Insufficient Activity (Bank 1)
- DTC P0147: Heated Oxygen Sensor No. 3 Heater Circuit (Bank 1)
- DTC P0151: Heated Oxygen Sensor No. 1 - Low Voltage (Bank 2)
- DTC P0152: Heated Oxygen Sensor No. 1 - High Voltage (Bank 2)
- DTC P0153: Heated Oxygen Sensor No. 1 - Slow Response (Bank 2)
- DTC P0154: Heated Oxygen Sensor No. 1, Bank 2 - Insufficient Activity ("L" & "M" Series)
- DTC P0154: Heated Oxygen Sensor No. 1, Bank 2 - Insufficient Activity ("S" & "T" Series)
- DTC P0155: Heated Oxygen Sensor No. 1, Bank 2 Circuit
- DTC P0171: Fuel Trim System Lean - Bank 1
- DTC P0172: Fuel Trim System Rich - Bank 1
- DTC P0174: Fuel Trim System Lean - Bank 2
- DTC P0175: Fuel Trim System Rich - Bank 2
- DTC P0300-P0306: Engine Misfire Detected
- DTC P0325: Knock Sensor Module Circuit
- DTC P0327: Knock Sensor Circuit
- DTC P0336: Crankshaft Position Sensor Performance
- DTC P0337: Crankshaft Position Sensor Circuit - Low Duty Cycle
- DTC P0338: Crankshaft Position Sensor Circuit - High Duty Cycle
- DTC P0339: Crankshaft Position Sensor Circuit Intermittent
- DTC P0340: Camshaft Position Sensor Circuit
- DTC P0341: Camshaft Position Sensor Performance
- DTC P0401: EGR System - Insufficient Flow
- DTC P0404: EGR Open Position Performance
- DTC P0405: EGR Position Sensor Circuit - Low Voltage
- DTC P0410: Air Injection System ("S" & "T" Series)
- DTC P0420: Three-Way Catalyst - Low Efficiency (Bank 1)
- DTC P0440: Evaporative Emission System
- DTC P0442: Evaporative System - Small Leak Detected
- DTC P0446: Evaporative Vent System Performance
- DTC P0452: Fuel Tank Pressure Sensor Circuit - Low Voltage
- DTC P0453: Fuel Tank Pressure Sensor Circuit - High Voltage
- DTC P0461: Fuel Level Sensor Circuit Malfunction
- DTC P0462: Fuel Level Sensor Circuit - Low Voltage
- DTC P0463: Fuel Level Sensor Circuit - High Voltage
- DTC P0500: Vehicle Speed Sensor Circuit
- DTC P0506: Idle Speed - Low
- DTC P0507: Idle Speed - High
- DTC P0601: Control Module Prom
- DTC P0602: Control Module Not Programmed
- DTC P0603: Control Module Long Term Memory Reset
- DTC P0604: Control Module Random Access Memory
- DTC P0605: Control Module Programming Read Only Memory
- DTC P0704: Clutch Switch Circuit ("S" & "T" Series)
- DTC P1106: Map Sensor Circuit Intermittent High Voltage
- DTC P1107: Map Sensor Circuit Intermittent Low Voltage
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage
- DTC P1121: Throttle Position Sensor Circuit Intermittent High Voltage
- DTC P1122: Throttle Position Sensor Circuit Intermittent Low Voltage
- DTC P1133: Heated Oxygen Sensor No. 1 - Insufficient Switching (Bank 1)
- DTC P1134: Heated Oxygen Sensor No. 1 Transition Time Ratio (Bank 1)
- DTC P1153: Heated Oxygen Sensor No. 1 - Insufficient Switching (Bank 2)
- DTC P1154: Heated Oxygen Sensor No. 1 Transition Time Ratio (Bank 2)
- DTC P1336: Crankshaft Position Sensor System Variation Not Learned
- DTC P1345: Crankshaft/Camshaft Position Sensor Correlation
- DTC P1351: Ignition Control Circuit - High Voltage
- DTC P1361: Ignition Control Circuit - Low Voltage
- DTC P1380: Misfire Detected - Rough Road Data Not Available
- DTC P1381: Misfire Detected - No Communication With Brake Control Module
- DTC P1404: EGR Valve Closed Pintle Position
- DTC P1415: Secondary Air Injection System - Bank 1 ("S" & "T" Series)
- DTC P1416: Secondary Air Injection System - Bank 2 ("S" & "T" Series)
- DTC P1441: Evaporative Emission System Flow During Non-Purge
- DTC P1508: Idle Speed Low - Idle Air Control Valve Not Responding
- DTC P1509: Idle Speed High - Idle Air Control System Not Responding
- DTC P1621: Control Module Long Term Memory Performance
- DTC P1626: Theft Deterrent Fuel Enable Signal Not Received
- DTC P1631: Theft Deterrent Start Enable Signal Not Correct
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.
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