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Home >> Chevrolet >> 2008 >> Optra5 LS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.6L >> Diagnostic Information and Procedures >> DTC P1321 >> Circuit/System Verification
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Circuit/System Verification

  1. Engine running, observe the DTC information with a scan tool. DTC P1321 should not set.
  2. Move related harnesses/connectors of the CKP sensor and verify the engine does not stumble, stall, or change engine speed.
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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