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Home >> Chevrolet >> 2021 >> Spark LS, Automatic CVT Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Displays And Gauges >> Diagnostic Information and Procedures >> Tachometer Inaccurate or Inoperative >> Circuit/System Verification

Circuit/System Verification

  1. Verify no DTC is set.
    • Go to next step: If no DTCs are set 
  2. Ignition ON.
  3. Verify all tachometer segments illuminate and turn off as commanded when performing the Driver Information Center Segments test with the scan tool.
    • If tachometer segments do not illuminate 

      Replace the P16 Instrument Cluster.

    • Go to next step: If tachometer segments illuminate properly 
  4. Engine running.
  5. Verify the tachometer value matches the scan tool Engine Speed parameter.
    • If the value does not match 

      Replace the P16 Instrument Cluster.

    • Go to next step: If the tachometer value matches the value displayed on the scan tool 
  6. Replace the K20 Engine Control Module.
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