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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P040B - P204D)) >> Diagnostic Information And Procedures >> DTC P1428 Or P142A: EGR Temperature Sensor 1-2 - Intake Air Temperature 2 Not Plausible >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON
  2. Verify DTCs P0096, P0097, P0098, P0099, P00E9, P010B, P0111, P0114, P0116, P0117, P0118, P0119, P0128, P017B, P017C, P017D, P111E, P117B, P117C, P117D, P117E, P117F or P262B are not set.
    • Go to next step: If none of the DTCs are set 
    3. NOTE:

    Determine the ambient temperature by using an accurate thermometer.

  3. Ignition OFF for greater than 8 hours.
  4. Observe the scan tool EGR Cooler Temperature Sensor 1 and 2 parameters and compare them to the ambient temperature. The reading for EGR Cooler Temperature Sensor 1 and 2 should be within 30°C (54°F) of the ambient temperature.
    • If not within the specified range 

      Refer to Circuit/System Testing.

    • Go to next step: If within the specified range 
  5. Engine running.
  6. Verify the scan tool EGR Temperature Sensor 1 and EGR Temperature Sensor 2 parameters are between -39° to +999°C (-38° to +1, 830°F) and changes with engine run time.
    • If not between -39° to +999°C (-38° to +1, 830°F) or does not change 

      Refer to Circuit/System Testing.

    • Go to next step: If between -39° to +999°C (-38° to +1, 830°F) and changes 
  7. All OK.
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