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 MANUALSCHEVROLET2009COBALT L4-2.2LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSKNOCK SENSORSERVICE AND REPAIR
2009 Chevrolet Cobalt L4-2.2L
Knock Sensor: Service and Repair
2009 Chevrolet Cobalt L4-2.2LSECTION Service and Repair
Knock Sensor Replacement
Removal Procedure
1. Disconnect the knock sensor (KS) electrical connector (3).
2. Remove the KS bolt.
3. Remove the KS.
Installation Procedure
Note: Rotate the pigtail 90 degrees from vertical before securing the fastener.
1. Install the KS.
Caution: Refer to Fastener Caution (Fastener Caution).
2. Install the KS bolt and tighten to 25 Nm (18 lb ft).
3. Connect the KS electrical connector (3).
RENDER: 1.0x
NO RELATED
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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.