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.
2012 Chevrolet Volt L4-1.4L ElectFACTORY OEM SERVICE PROCEDURE
Knock Sensor: Locations
Powertrain Component Views
Left Rear of Engine Components
1 - B34 Engine Coolant Temperature Sensor
2 - K35 Ignition Coil Module
3 - Q17D Fuel Injector 4
4 - Q17C Fuel Injector 3
5 - Q12 Evaporative Emission Purge Solenoid Valve
6 - Q17B Fuel Injector 2
7 - Q17A Fuel Injector 1
8 - B74 Manifold Absolute Pressure Sensor
9 - B68 Knock Sensor
10 - B26 Crankshaft Position Sensor
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.