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Home >> Chevrolet >> 2007 >> Optra LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.6L (L91) >> Diagnostic Information and Procedures >> DTC P1181 or P1182 >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition On, command the IMT valve solenoid ON and OFF with a scan tool. You should hear and feel an audible click.
  2. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.
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