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Home >> Cadillac >> 2007 >> DTS 4.6 9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.6L - DTC P0016 To P0341 >> DTC P0106 >> Circuit/System Verification
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Circuit/System Verification

  1. Verify that P0641 or P0651 are not set.
    • If any of the DTCs are set, refer to DTC P0641 or P0651  .
  2. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust .
  3. Verify that the engine is in good mechanical condition. Refer to Symptoms - Engine Mechanical .
  4. Ignition OFF for 90 seconds, determine the current vehicle testing altitude. Ignition ON, observe the scan tool MAP Sensor parameter. Compare the parameter to the Altitude Versus Barometric Pressure table. The MAP Sensor parameter should be within the specified range indicated in the table.
  5. A skewed MAP sensor will also cause the first and second intake manifold models to disagree wit the actual MAP sensor measurements. Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions. The readings should be within 3 kPa of the known good vehicle.
  6. Ignition ON, observe the scan tool MAP sensor parameter. Start the engine. The MAP Sensor parameter should change.
  7. Engine running, observe the DTC information with a scan tool. DTC P0106 should not set.
  8. 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.
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