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Home >> Chevrolet >> 2022 >> Blazer RS, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls And Fuel - 2.0L - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC P0237 or P0238 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0641, P0651, P0697, P06A3, P06D2 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Verify the scan tool parameter: Boost Pressure Sensor = 50 to 371 kPa (7.3 to 53.8 PSI)
    • If not between 50 and 371 kPa (7.3 and 53.8 PSI) 

      Refer to: Circuit/System Testing

    • Go to next step: If between 50 and 371 kPa (7.3 and 53.8 PSI) 
  4. Verify the scan tool parameter: Boost Pressure Sensor = The value should not spike or drop out.

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector: B111 Turbocharger Boost Sensor
    • Wiggle the harness and connector: K20 Engine Control Module
    • If the value spikes or drops out 

      Repair as necessary - Wiring / Terminal (s) / Electrical Connector (s)

    • Go to next step: If the value does not spike or drop out 
  5. 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 is not set 
  6. All OK.
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