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Home >> Chevrolet >> 2011 >> Impala LT >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.5L - DTC P0010 Through DTC P0340 >> DTC P0171 or P0172 >> Circuit/System Verification >> Notes

Circuit/System Verification: Notes

  1. Verify that other DTCs are not set.
  2. Ignition ON, engine OFF, observe the manifold absolute pressure (MAP) sensor parameter. The MAP sensor pressure should be within the range specified for your altitude. Refer to Altitude Versus Barometric Pressure .
    • If the MAP sensor does not indicate the correct barometric pressure, refer to DTC P0106 .
  3. With the engine idling, observe the mass air flow (MAF) sensor parameter. The MAF sensor parameter should be between 2-6 g/s at idle.
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