Circuit/System 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.
- Ignition - On / Vehicle - In Service Mode
- Verify the scan tool parameter: MAP Sensor = 19 to 42 kPa (2. 7 to 6 PSI)
- If not in the specified range
Refer to: DTC P0106, P0107, or P0108
- Go to next step: If in the specified range
- If not in the specified range
- Verify the following conditions do not exist:
- Fuel - Contaminated/Poor Quality - Refer to: Alcohol/Contaminants-in-Fuel Diagnosis
- Positive Crankcase Ventilation System - Incorrect connection/Leaking/Restricted - Refer to: Crankcase Ventilation System Inspection/Diagnosis
- Exhaust System - Leaking/Missing components/Restricted - Refer to: Symptoms - Engine Exhaust
- Intake Manifold - Leaking
- Intake Air Duct - Loose Clamps/Cracked/Visible Damage
- Mass Airflow Sensor - Contamination of the measuring element/Water intrusion
- Fuel Injectors - Restricted - Refer to: Fuel Injector Diagnosis
- Vacuum Hoses - Incorrect connection/Kinked/Leaking/Restricted
- Ignition System = Malfunction - Refer to: Electronic Ignition System Diagnosis
- If a condition exists - Repair or replace as necessary
- Go to next step: If no condition exists
- Refer to: Symptoms - Engine Mechanical