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 MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 176 (FUEL SYSTEM & EMISSIONS SYSTEM)
2008 Chevrolet HHR LT, 2.4 P, Automatic
Section 176 (Fuel System & Emissions System)
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Section 176 (Fuel System & Emissions System)
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
- Special Tools
- General Troubleshooting Information
- DTC Troubleshooting Index
- Symptom Troubleshooting Index
- System Description
- Fuel and Emissions System Diagram
- Vacuum Hose Routing
- Electronic Control Systems
- PCM Inputs and Outputs at PCM Connector A (β‘ ) (44P)
- PCM Inputs and Outputs at PCM Connector B (Ξ ) (44P)
- PCM Inputs and Outputs at PCM Connector C (β¦) (44P)
- PCM Electrical Connections
- PCM Circuit Diagram
- PGM-FI System
- Notes
- Air Conditioning (A/C) Compressor Clutch Relay
- Air Fuel Ratio (A/F) Sensor
- Barometric Pressure (BARO) Sensor
- Camshaft Position (CMP) Sensor
- Crankshaft Position (CKP) Sensor
- Engine Coolant Temperature (ECT) Sensors 1 and 2
- Ignition Timing Control
- Injector Timing and Duration
- Knock Sensor
- Manifold Absolute Pressure (MAP) Sensor
- Malfunction Indicator Lamp (MIL) Indication (In relation to Readiness Codes)
- Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor
- Vehicle Speed Sensor
- Secondary Heated Oxygen Sensor (Secondary HO2S)
- Electronic Throttle Control System
- Electronic Throttle Control System Diagram
- VTEC
- Catalytic Converter System
- Exhaust Gas Recirculation (EGR) System
- Exhaust Gas Recirculation (EGR) System Diagram
- Positive Crankcase Ventilation (PCV) System
- Evaporative Emission (EVAP) System
- Evaporative Emission (EVAP) Control Diagram
- Fuel Cap Warning Message
- Ecological Drive Assist System (Eco assist)
- Effective Control
- Driver Feedback System
- How to Set Readiness Codes
- Malfunction Indicator Lamp (MIL) Indication (In relation to Readiness Codes)
- Catalytic Converter Monitor and Readiness Code
- Evaporative Emission (EVAP) Control System Monitor and Readiness Code
- Air Fuel Ratio (A/F) Sensor Monitor and Readiness Code
- Air Fuel Ratio (A/F) Sensor Heater Monitor Readiness Code
- EGR Monitor and Readiness Code
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.