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Home >> Chevrolet >> 2008 >> Optra LS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.8L (LDA) >> Diagnostic Information and Procedures >> DTC P0122 or P0123 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, observe the scan tool TP Sensor parameter. The reading should be between 0.4-4.5 volts.
  2. Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the procedure several times. DTC P0122 or P0123 should not set.
  3. Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times. DTC P0122 or P0123 should not set.
  4. 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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