2014 Chevrolet Spark LS, Standard TransFACTORY OEM SERVICE PROCEDURE

Knock Sensor Replacement

Fig 1: Knock Sensor
GM3415995Courtesy of GENERAL MOTORS COMPANY
Knock Sensor Replacement

Callout Component Name

Preliminary Procedures

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Disconnect the starter connector. Refer to Starter Replacement .
  4. Disconnect the generator connector. Refer to Generator Replacement .
  5. Remove the intake manifold rear bracket. Refer to Lower Intake Manifold Replacement (LFM) .
  6. Disconnect the knock sensor wiring harness connector.
1 Knock Sensor Retaining Bolt
CAUTION:

Refer to Fastener Caution .


Procedure 
Remove the knock sensor retaining bolt.
Tighten 
25 (18 lb ft)
2 Knock Sensor
Factory Service Tools

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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.

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