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Home >> Chevrolet >> 2008 >> Optra LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (Diesel) >> Diagnostic Information and Procedures >> DTC P20E2 >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition On, observe the DTC information with a scan tool. Verify no other DTCs are set.
    2. IMPORTANT: Allow the exhaust to cool completely in order to avoid misdiagnosis.
  2. Ignition ON, observe the scan tool EGT sensors and IAT sensor data parameters. Both EGT sensor data parameters, and the IAT sensor data parameter should display within 3°C (5°F).
  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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