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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 P20CB, P20CD, P20CE, P2670, or P2671 >> Component Testing

Component Testing

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.

Static Test

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: Q67 Exhaust Aftertreatment Fuel Injector
  3. Test for 10 to 14 ohms between the test points: Control terminal 1 & Control terminal 2
    • If not between 10 and 14 ohms 

      Replace the component: Q67 Exhaust Aftertreatment Fuel Injector

    • Go to next step: If between 10 and 14 ohms 
  4. All OK.
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