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 P0087, 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, P0234, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0299, P02EE, P02EF, P02F0, P02F1, P0403, P0405, P0406, P042E, P042F, P0489, P0490, P049D, P0545, P0546, P062B, P062D, P111E, P113B, P113C, P113D, P113F, P115E, P115F, P1160, P116A, P116B, P116C, P116D, P116E, P116F, P118E, P118F, P1192, P1193, P1194, P1196, P1198, P119A, P119B, P119C, P11B3, P11DB, P11DD, P1248, P1249, P124A, P124B, P126A, P1402, P1407, P140F, P1424, P2032, P2033, P2080, P2081, P2084, P2085, P2147, P2148, P2150, P2151, P2200, P2205, P2206, P2207, P2208, P2209, P220A, P2210, P2211, P2227, P2228, P2229, P2230, P2263, P228A, P228B, P2481, P2482, P2483, P2484, P242B, P242C, P242D, P242E, P2452 - P2456, P2628, P2627, or U029D is not set.
- If any of the DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If none of the DTCs are set
Verify that none of the conditions listed below exist:
- Leaking or restricted intake system/charge air hoses. Refer to Charge Air Cooler Diagnosis (Full System Leak Test) , or Charge Air Cooler Diagnosis (Induction System Smoke Test)
- Leaking exhaust system/turbo charger. Refer to Exhaust Leakage
- Contaminated fuel. Refer to Contaminants-in-Fuel Diagnosis
- If a condition is found
  Repair as necessary.
- Go to next step: If no condition is found
Clear all DTCs with a scan tool
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 that DTCs P2297 or P2A00 are not set
- If any of the DTCs are set
  Replace the B195A Nitrogen Oxides Sensor 1
- Go to next step: If none of the DTCs are set
All OK.