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Home >> Chevrolet >> 2013 >> Sonic RS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Automatic Transmission - 6T30/6T40 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0722, P0723, P077C, or P077D >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Verify with a scan tool the transmission ISS/OSS Supply Voltage test status parameter displays OK.
    • If OK is displayed  
  3. Verify the scan tool Transmission OSS parameter changes with vehicle speed or does not drop out, while operating the vehicle at 16-32 km/h (10-20 mph).
    • If the Transmission OSS varies with vehicle speed and does not drop out 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  5. Verify the DTC does not set.
    • If the DTC does not set 
  6. All OK.