Circuit/System Testing
WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
- Engine - Running
- Verify the scan tool parameter: Manifold Absolute Pressure Sensor = 19 to 42 kPa (2.7 to 6 PSI)
- If not in the specified range
Refer to: DTC P0107 or P0108
- Go to next step: If in the specified range
- If not in the specified range
- Ignition Off
- Verify the following conditions do not exist:
- Exhaust System - Leaking/Missing components/Restricted - Refer to: Symptoms - Engine Exhaust
- Fuel - Contaminated/Poor Quality - Refer to: Alcohol/Contaminants-in-Fuel Diagnosis
- Fuel Injectors - Restricted - Refer to: Fuel Injector Diagnosis
- Ignition System = Malfunction - Refer to: Electronic Ignition System Diagnosis
- Intake Air Duct - Loose Clamps/Cracked/Visible Damage
- Intake Manifold - Leaking
- Mass Airflow Sensor - Contamination of the measuring element/Water intrusion
- Positive Crankcase Ventilation System - Incorrect connection/Leaking/Restricted - Refer to: Crankcase Ventilation System Inspection/Diagnosis
- Vacuum Hoses - Incorrect connection/Kinked/Leaking/Restricted
- If a condition exists - Repair or replace as necessary
- Go to next step: If no condition exists
- Refer to: Symptoms - Engine Mechanical