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.

Ignition On.
Verify DTC P00C7, P00E9, P00EA, P00EB, P00EC, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0119, P0128, P0201, P0202, P0203, P0204, P020A, P020B, P020C, P020D, P0216, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P02EE, P02EF, P02F0, P02F1, P0405, P0406, P049D, P0502, P0503, P062B, P062D, P0722, P0723, P111E, P113E, P1197, P1248, P1249, P124A, P124B, P126A, P2147, P2148, P2150, P2151, P2470, P2471, or P2472 is not set.
- If a DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If a DTC is not set
Verify that the resistance of the B131 Exhaust Gas Temperature Sensor 3 and 4 is within the range specified in Temperature Versus Resistance - Exhaust Gas Temperature Sensor
- If not within the specified range
  Replace the appropriate B131 Exhaust Gas Temperature Sensor
- Go to next step: If within the specified range
Verify the following conditions do not exist:
- Improperly operating exhaust aftertreatment fuel injector. Refer to Exhaust Aftertreatment Fuel Injector Diagnosis
- Exhaust system leaks - Refer to Exhaust Leakage .
- A loose or disconnected charge air cooler hose or pipe
- Loose or missing induction or exhaust system components
- If a condition is found
  Repair as necessary.
- Go to next step: If no condition is found
Perform the Diesel Particulate Filter Service Regeneration
Verify the regeneration completed.
- If the regeneration did not complete
  Replace the exhaust particulate filter.
- Go to next step: If the regeneration completed
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 a DTC sets
  Replace the exhaust particulate filter.
- Go to next step: If the DTC does not set
All OK.