LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2007 >> STS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.4L - DTC P0010 To DTC P0158 >> DTC P0068 or P0121 >> Circuit/System Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Verification

  1. If DTCs P0101, P0106, P0120, P012B, and P0220 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
  2. Ignition ON, observe the scan tool BARO, MAP, and the SC Inlet Pressure sensor parameters. The readings should be within the range specified for your altitude. Determine the altitude at your current location and refer to Altitude Versus Barometric Pressure .
  3. Engine running, observe the DTC information with a scan tool. DTCs P0068 or P0121 should not set.
  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.
scientia non olet · About LEMON Manuals