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.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 85 (ENGINE CONTROL SYSTEM - 3.8L - INTRODUCTION (2 OF 2))
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Section 85 (Engine Control System - 3.8L - Introduction (2 Of 2))
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Section 85 (Engine Control System - 3.8L - Introduction (2 Of 2))
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Repair Instructions
- Powertrain Control Module (PCM) Replacement
- CKP System Variation Learn Procedure
- Engine Coolant Temperature (ECT) Sensor Replacement
- Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Replacement
- Manifold Absolute Pressure (MAP) Sensor Replacement
- Barometric Pressure (BARO) Sensor Replacement
- Heated Oxygen Sensor Replacement - Position 1
- Heated Oxygen Sensor Replacement - Position 2
- Accelerator Controls Pedal Replacement
- Throttle Body Assembly Replacement
- Throttle Body Cleaning Procedure
- Fuel Pressure Relief Procedure
- Fuel Pressure Gage Installation and Removal
- Quick Connect Fitting(s) Service (Metal Collar)
- Quick Connect Fitting(s) Service (Plastic Collar)
- Fuel Tank Draining Procedure
- Fuel Tank Replacement
- Fuel Tank Pressure Sensor Replacement
- Fuel Level Sensor Replacement
- Fuel Strainer Replacement
- Filler Tube Replacement
- Fuel Sender Assembly Replacement
- Fuel Hoses/Pipes Replacement - Filter to Tank
- Fuel System Cleaning
- Fuel Rail Assembly Replacement
- Fuel Pressure Regulator Replacement
- Fuel Injector Cleaning Procedure
- Fuel Injector Replacement
- Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement
- Evaporative Emission (EVAP) Canister Vent Solenoid Valve Replacement
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Canister/Fuel Tank
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Chassis/Canister
- Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine/Chassis
- Evaporative Emission (EVAP) Canister Replacement
- Ignition Coil(s) Replacement
- Ignition Control Module Replacement
- Spark Plug Wire Inspection
- Spark Plug Wire Replacement
- Spark Plug Inspection
- Spark Plug Replacement
- Crankshaft Position (CKP) Sensor Replacement
- Camshaft Position (CMP) Sensor Replacement
- Knock Sensor (KS) 1 Replacement
- Knock Sensor (KS) 2 Replacement
- Secondary Air Injection (AIR) Pump Replacement
- Secondary Air Injection (AIR) Shut-Off Valve Outlet Pipe/Hose Replacement
- Secondary Air Injection (AIR) Shut-Off Valve Replacement
- Exhaust Gas Recirculation (EGR) Valve Replacement
- Exhaust Gas Recirculation (EGR) Inlet Pipe Replacement
- Exhaust Gas Recirculation (EGR) Outlet Pipe Replacement
- Exhaust Gas Recirculation (EGR) System Cleaning
- Air Cleaner Element Replacement
- Air Cleaner Assembly Replacement
- Air Cleaner Intake Duct Replacement
- Description and Operation
- Powertrain Control Module (PCM) Description
- Notes
- PCM Function
- EEPROM
- Data Link Connector (DLC)
- Malfunction Indicator Lamp (MIL) Operation
- PCM Service Precautions
- Emissions Diagnosis For State I/M Programs
- Aftermarket (Add-On) Electrical And Vacuum Equipment
- Electrostatic Discharge (ESD) Damage
- Emissions Control Information Label
- Underhood Inspection
- Basic Knowledge Required
- Throttle Actuator Control (TAC) System Description
- Fuel System Description
- Fuel System Overview
- Fuel Tank
- Fuel Fill Pipe
- Fuel Filler Cap
- Fuel Sender Assembly
- Fuel Level Sensor
- Fuel Pump
- Fuel Strainer
- Fuel Feed Pipe
- Nylon Fuel Pipe
- Quick-Connect Fittings
- Fuel Pipe O-Rings
- Fuel Rail Assembly
- Fuel Injectors
- Fuel Pressure Regulator Assembly
- Fuel Metering Modes of Operation
- Starting Mode
- Clear Flood Mode
- Run Mode
- Acceleration Mode
- Deceleration Mode
- Battery Voltage Correction Mode
- Fuel Cutoff Mode
- Fuel Trim
- Evaporative Emission (EVAP) Control System Description
- Electronic Ignition (EI) System Description
- Knock Sensor (KS) System Description
- Secondary Air Injection (AIR) System Description
- Exhaust Gas Recirculation (EGR) System Description
- Powertrain Control Module (PCM) Description
- Special Tools and Equipment
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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.