Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Ignition - On/Vehicle - In Service Mode
- Verify there are no related DTCs set in the following system:
- B52 Heated Oxygen Sensor
- B65 Intake Manifold Pressure and Air Temperature Sensor
- B75 Mass Airflow Sensor
- B111 Turbocharger/Supercharger Boost Pressure Sensor
- M128 Turbocharger Wastegate Actuator
- Q12 Evaporative Emission Purge Solenoid Valve
- Q17 Fuel Injector
- Q38 Throttle Body
- Q40 Turbocharger Bypass Solenoid Valve
- Barometric Pressure Sensor
- Engine - Mechanical Condition
- Engine Misfire
- Fuel System
- Positive Crankcase Ventilation System
- If a related DTC is set
- Go to next step: If a related DTC is not set
- Verify the scan tool parameter: Throttle Body Idle Air Flow Compensation = Less than 90%
- If 90% or greater
Refer to: Throttle Body Cleaning
- Go to next step: If less than 90%
- If 90% or greater
- Verify the scan tool parameter:
- Boost Pressure Sensor = The value should be within the range listed in the table: Altitude Versus Barometric Pressure
- MAP Sensor = The value should be within the range listed in the table: Altitude Versus Barometric Pressure
- If not in the specified range
- {B65 Intake Manifold Pressure and Air Temperature Sensor} Refer to: DTC P0106, P0107, or P0108
- {B111 Turbocharger Boost Sensor} Refer to: DTC P0236, P0237, or P0238
- Go to next step: If in the specified range
- Engine - Idling - At normal operating temperature.
- Accessories - Off
- Verify the scan tool parameter:
- MAP Sensor = 26 to 52 kPa (3.8 to 7.5 PSI) @ Idle Speed
- MAP Sensor = The value should change with accelerator pedal input.
- If not between 26 and 52 kPa (3.8 and 7.5 PSI) or does not change
Refer to: DTC P0106, P0107, or P0108
- Go to next step: If between 26 and 52 kPa (3.8 and 7.5 PSI) and changes
- Verify the scan tool parameter: Boost Pressure Sensor = The value should change with accelerator pedal input.
- If the value does not change
Refer to: DTC P0236, P0237, or P0238
- Go to next step: If the value changes
- If the value does not change
- Increase the engine speed slowly to 3k RPM and then back to idle.
- Perform the scan tool function: Review Stored Data
- Observe the scan tool parameter frame by frame with a scan tool: MAF Sensor
Verify the scan tool parameter: MAF Sensor = The value should not spike or drop out.
- If the value spikes or drops out
Refer to: DTC P0102, P0103, or U060F
- Go to next step: If the value does not spike or drop out
- If the value spikes or drops out
- Perform the following action:
- Road test the vehicle.
- Accelerate to wide open throttle until the transmission reaches the 1-2 shift.
Verify DTC P0299 is not set.
WARNING:Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.
- If the DTC sets
Refer to: Circuit/System Testing
- Go to next step: If the DTC does not set
- 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
Refer to: Circuit/System Testing
- Go to next step: If the DTC does not set
- If the DTC sets
- All OK.