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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> DTC P206B-P206D >> 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 P206B, P206C, P206D is not set.
    • If any of the DTCs are set 
    1. Verify the scan tool parameter : Reductant Quality Sensor Status = OK
      • If not the specified state
        NOTE:

        This action should dissipate air bubbles or crystallized reductant that adversely affect the performance of the sensor.

        NOTE:

        If the reductant has been frozen, the vehicle should be parked inside overnight to allow the reductant system to warm to greater than 5°C (41°F).

        WARNING:

        Refer to Road Test Warning .

      2. Operate the vehicle under the following conditions : Accelerate/Stop - For greater than 10 min Refer to step 2.2
      • Go to next step : If the specified state
    2. 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. - For greater than 7 min

      Verify the DTC does not set.

      • If the DTC sets

        Replace the component : B212 Reductant Sensor Module

      • Go to next step : If the DTC is not set
    3. All OK.
    • Go to next step : If none of the DTCs are set 
  3. All OK.
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