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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (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 car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  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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