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 / Vehicle - In Service Mode
- Verify there are no DTCs set related to the following system/component:
- B9 Ambient Air Temperature Sensor
- B17 Barometric Pressure Sensor
- B26 Crankshaft Position Sensor
- B34 Engine Coolant Temperature Sensor
- B47B Fuel Rail Pressure Sensor
- B65 Intake Manifold Pressure and Air Temperature Sensor
- B75C Multifunction Intake Air Sensor
- B115 Vehicle Speed Sensor
- B130 Exhaust Gas Recirculation Temperature Sensor
- B131 Exhaust Temperature Sensor
- B136 Exhaust Particulate Matter Sensor
- B154 Diesel Particulate Filter Exhaust Differential Pressure Sensor
- B195 Nitrogen Oxides Sensor
- M103 Turbocharger Vane Position Actuator
- Q14 Exhaust Gas Recirculation Valve
- Q17 Fuel Injector
- Q38 Throttle Body
- If a related DTC is set
- Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If a related DTC is not set
- Verify the following conditions do not exist:
- Induction System - Leaking/Restricted - Refer to: Charge Air Cooler Diagnosis (Full System Leak Test) , or Charge Air Cooler Diagnosis (Induction System Smoke Test)
- Exhaust System/Turbocharger - Leaking/Restricted - Refer to: Exhaust Leakage
- If a condition exists
Repair or replace as necessary.
- Go to next step: If no condition exists
- All OK.