Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.

Ignition - On / Vehicle - In Service Mode
Verify DTC P0102, P0103, P0641, P0651, P0697, P06A3, P2228, P2229, P2230, P227C, P227D, P227E, U060F 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 the scan tool parameter:
- Barometric Pressure Sensor = Altitude Versus Barometric Pressure - The value should be within the range listed in the table.
- Barometric Pressure Sensor 2 = Altitude Versus Barometric Pressure - The value should be within the range listed in the table.
- If not in the specified range
  Refer to DTC P2228-P2230 or P227C-P227E
- If in the specified range
Verify the following conditions do not exist:
- B75 Mass Airflow Sensor - Contamination of the measuring element /Cracked/Loose Clamps / Visible Damage/Water intrusion
- O-Ring @ B75 Mass Airflow Sensor/Leaking/Missing/Visible Damage
- 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 & Barometric Pressure Sensor 2 - The value should not spike or drop out.
Perform the action while monitoring the parameter:
- Wiggle the harness and connector: B75 Mass Airflow Sensor
- Wiggle the harness and connector: K20 Engine Control Module
- If the value spikes or drops out
  Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)
- Go to next step: If the value does not spike or drop out
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 the DTC does not set.
- If the DTC sets
  Replace the component: B75 Mass Airflow Sensor
- Go to next step: If the DTC is not set
All OK.