Circuit/System Verification
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.
- Ignition - On/Vehicle - In Service Mode
- Verify DTC P0106, P0107, P0108, P2122, P2123, P2127, P2128, P2138, P2610 is not set.
- If any of the DTCs are set
- Go to next step: If none of the DTCs are set
- Verify the scan tool parameter: Throttle Body Idle Air Flow Compensation = Less than 90%
- If 90% or greater
Refer to: Throttle Body Inspection and Cleaning
- Go to next step: If less than 90%
- If 90% or greater
- Verify the following conditions do not exist:
- B74 Manifold Absolute Pressure Sensor - Leaking @O-Ring - Missing/Visible Damage
- B75 Mass Airflow Sensor - Contamination of the measuring element/Cracked/Loose Clamps/Visible Damage/Water intrusion
- B111B Turbocharger Boost/Intake Air Temperature Sensor
- Leaking @ O-Ring - Missing/Visible Damage
- Restricted - Moisture/Ice
- Skewed
- Q38 Throttle Body
- Coking/Loose Clamps/Visible Damage
- Restricted - Moisture/Ice
- Air Cleaner Element - Dirty/Restricted
- Catalytic Converter - Blocked/Restricted/Visible Damage
- Charge Air Cooler
- Leaking/Incorrect connection
- Restricted - Moisture/Ice
- Intake Air Duct - Cracked/Loose Clamps/Restricted/Visible Damage
- Intake Manifold - Cracked/Loose Clamps/Restricted/Vacuum leak/Visible Damage
- Positive Crankcase Ventilation System
- Leaking @ O-Ring - Missing/Visible Damage
- Restricted - Moisture/Ice
- Incorrect connection/Leaking/Restricted
- If a condition exists
Repair or replace as necessary
- Go to next step: If no condition exists
- Verify the scan tool parameter:
- Barometric Pressure Sensor = Altitude Versus Barometric Pressure - The value should be within the range listed in the table.
- Manifold Absolute Pressure Sensor = Altitude Versus Barometric Pressure - The value should be within the range listed in the table.
- Turbocharger/Supercharger Boost Pressure Sensor = Altitude Versus Barometric Pressure - The value should be within the range listed in the table.
- If not in the specified range
- {Barometric Pressure Sensor} Refer to: DTC P10BC, P2228-P2230, or P227C-P227E
or
- {Manifold Absolute Pressure Sensor} Refer to: DTC P0107 or P0108
- {Turbocharger/Supercharger Boost Pressure Sensor} Refer to: DTC P0237 or P0238
- Go to next step: If in the specified range
- All OK.