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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P0016 - P049D)) >> Diagnostic Information And Procedures >> DTC P0234, P0299, Or P2263: Engine Overboost/Engine Underboost/Turbocharger Boost System Performance >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON
  2. Verify that DTC P003A, P0045, P0047, P0048, P00C7, P007B, P007C, P007D, P007E, P0106, P0107, P0108, P02E0, P02E2, P02E3, P02E4, P02E5, P026A, P0502, P0503, P0722, P0723, P0111, P0112, P0113, P0114, P0101, P0102, P0103, P010B, P010C, P010D, P0116, P0117, P0118, P0119, P0128, P111E, P02E8, P02E9, P122D, P16A0, P16A1, P16A2, P2227, P2228, P2229, or P2230 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Verify the scan tool MAP Sensor parameter is within the range listed in the following table: Altitude Versus Barometric Pressure
    • If not within the specified range 

      Refer to DTC P0107 or P0108  Circuit/System Testing.

    • Go to next step: If within the specified range 
  4. Engine running, increase the engine speed to 2, 000 RPM.
  5. Verify the scan tool MAP Sensor pressure parameter increases and decreases with the engine speed.
    • If the MAP Sensor parameter does not increase and decrease 

      Refer to Circuit/System Testing.

    • Go to next step: If the MAP Sensor parameter does increase and decrease 
  6. 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.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to Circuit/System Testing.

    • Go to next step: If the DTC does not set 
  7. All OK