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 MANUALSBUICK2012VERANOREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 149 (ENGINE CONTROLS AND FUEL - 2.2L - DESCRIPTION AND OPERATION)
2012 Buick Verano
Section 149 (Engine Controls And Fuel - 2.2L - Description And Operation)
2012 Buick VeranoSECTION Section 149 (Engine Controls And Fuel - 2.2L - Description And Operation)
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- Description and Operation
- Engine Control Module Description
- Throttle Actuator Control (TAC) System Description
- Camshaft Actuator System Description
- Fuel System Description (NU6)
- Fuel System Overview
- Fuel Tank
- Fuel Fill Pipe
- Fuel Filler Cap
- Fuel Pump Module
- Fuel Level Sensor
- Fuel Filter
- Fuel Pump
- Fuel Pump Fuel Reservoir Pump Fuel Strainer Orifice
- Fuel Strainer
- Fuel Pressure Regulator Assembly
- Fuel Feed Pipe
- Nylon Fuel Pipes
- Quick-Connect Fittings
- Fuel Pipe O-rings
- Fuel Rail Assembly
- Fuel Injectors
- 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
- Fuel System Description (NT7, NU1)
- Fuel System Overview
- Fuel Tank
- Fuel Fill Pipe
- Fuel Filler Cap
- Fuel Pump Module
- Fuel Level Sensor
- Fuel Pump
- Fuel Strainer
- Fuel Pressure Regulator
- Fuel Filter
- Fuel Feed and Return Pipes
- Nylon Fuel Pipes
- Quick-Connect Fittings
- Fuel Rail Assembly
- Fuel Injectors
- Fuel Metering Modes of Operation
- Starting Mode
- Clear Flood Mode
- Run Mode
- Acceleration Mode
- Deceleration Mode
- Battery Voltage Correction Mode
- Fuel Cut-Off Mode
- Fuel Trim
- Evaporative Emission Control System Description
- Electronic Ignition System Description
- Air Intake System Description
- Secondary Air Injection System Description
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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.