Circuit/System Verification

• If any of the DTCs are set 

  Refer to DTC P0641, P0651, P0697, or P06A3

• Go to next step: If none of the DTCs are set 

• If 90% or greater 

  Refer to Throttle Body Inspection and Cleaning

• Go to next step: If less than 90% 

Verify the scan tool parameter: Throttle Position Sensor and Sensor 2 = Agree

• If not the specified state 

  Refer to DTC P0121-P0123, P0222, P0223, P2135, U0606, or U0607 

• Go to next step: If the specified state 

• Turbocharger/Supercharger Boost Pressure Sensor = The value should be within the range listed in the table: Altitude Versus Barometric Pressure
• Manifold Absolute Pressure Sensor = The value should be within the range listed in the table: Altitude Versus Barometric Pressure

• If not in the specified range 

• { Turbocharger/Supercharger Boost Pressure Sensor } Refer to: Circuit/System Testing
• { Manifold Absolute Pressure Sensor } Refer to DTC P0106, P0107, or P0108 

• Go to next step: If in the specified range 

• If the tool is not available 

  Refer to step 11

• Go to next step: If the tool is available 

Verify the procedure/test passes.

• If the procedure/test does not pass 

  Repair or replace as necessary

• Go to next step: If the procedure/test passes 

• B65 Intake Manifold Pressure and Air Temperature Sensor - Visible Damage
• B75C Multifunction Intake Air Sensor - Contamination of the measuring element / Visible Damage/Water intrusion
• B111 Turbocharger/Supercharger Boost Pressure Sensor
  • Restricted - Moisture/Ice
  • Skewed
• Q38 Throttle Body
  • Coking/Loose Clamps / Visible Damage
  • Restricted - Moisture/Ice
• Air Cleaner Element - Dirty / Restricted
• Catalytic Converter & Exhaust System - Blocked / Leaking / Restricted / Visible Damage - Refer to Symptoms - Engine Exhaust
• Charge Air Cooler - Restricted / Moisture / Ice
• Intake Air Duct - Collapsed/Restricted / Visible Damage
• Intake Manifold - Restricted / Visible Damage
NOTE:

It may be necessary to use a scan tool control function to operate a component.

• Linkage @ M128 Turbocharger Wastegate Actuator - Binding or Sticking/Loose/Visible Damage
• Q40 Turbocharger Bypass Valve Solenoid - Binding or Sticking/Loose/Visible Damage
• Positive Crankcase Ventilation System - Restricted - Moisture/Ice

• If a condition exists 

  Repair or replace as necessary

• Go to next step: If no condition exists 

NOTE:

The list is not all encompassing - Refer to Symptoms - Engine Mechanical

• Compressor Air Intake Turbocharger or Turbine Shaft Seal - Leaking - Engine Oil
• Compressor Air Intake Turbocharger - Low oil pressure
• Compressor Air Intake Turbocharger - Mechanical Condition/Worn
• Camshaft Lobe (s) - Visible Damage/Worn
• Exhaust Valve or Intake Valve - Stuck Open/Visible Damage
• Exhaust Valve Seat or Intake Valve Seat - Visible Damage
• Piston - Cracked/Visible Damage
• Piston Ring - Seized/Visible Damage/Worn

• If a condition exists 

  Repair or replace as necessary

• Go to next step: If no condition exists 

• B65 Intake Manifold Pressure and Air Temperature Sensor - Leaking @ O-Ring - Missing / Visible Damage
• B75C Multifunction Intake Air Sensor - Contamination of the measuring element Cracked / Loose Clamps / Visible Damage/Water intrusion
• B111 Turbocharger/Supercharger Boost Pressure Sensor
  • Leaking @ O-Ring - Missing / Visible Damage
  • Restricted - Moisture/Ice
  • Skewed
NOTE:

It may be necessary to use a scan tool control function to operate a component.

• M128 Turbocharger Wastegate Actuator - Linkage Binding or Sticking/Loose/Visible Damage
• Q40 Turbocharger Bypass Valve Solenoid - Binding or Sticking/Loose/Visible Damage
• 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
• Engine - Mechanical Condition - Refer to Symptoms - Engine Mechanical
• Exhaust System - Leaking / Restricted Visible Damage - Refer to Symptoms - Engine Exhaust
• Intake Air Duct or Turbocharger Inlet Duct - Cracked / Leaking / 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
• Turbocharger - Mechanical damage/Visible Damage - Refer to Compressor Air Intake Turbocharger System Description
• Vacuum leak @ Engine - Oil Level Indicator and Tube / Oil Filler Cap

• If a condition exists 

  Repair or replace as necessary

• Go to next step: If no condition exists 

• Manifold Absolute Pressure Sensor = 26 to 52 kPa (3.8 to 7.5 PSI) @ Idle Speed
• Manifold Absolute Pressure Sensor = The value should change with accelerator pedal input.

• If not in the specified range or does not change 

  Refer to DTC P0106, P0107, or P0108 

• Go to next step: If in the specified range and changes 

• If the value does not change 

  Refer to: Circuit/System Testing

• Go to next step: If the value changes 

Verify the scan tool parameter: Mass Air Flow Sensor = The value should not spike or drop out.

• If the value spikes or drops out 

  Refer to DTC P0102, P0103, P010C, P010D, U060F, U0610, U1319, or U131A 

• Go to next step: If the value does not spike or drop out 

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.

1. Road test the vehicle.
2. Perform the action while monitoring the parameter: Accelerate to wide open throttle until the transmission reaches the 1-2 shift.
3. Verify the following parameters are within 20 kPa (2.9 PSI) of each other:

• Turbocharger/Supercharger Boost Pressure Sensor
• Manifold Absolute Pressure Sensor

• If not within 20 kPa (2.9 PSI) of each other 

  Refer to: Circuit/System Testing

• Go to next step: If within 20 kPa (2.9 PSI) of each other 

Verify the DTC does not set.

• If the DTC sets 

  Refer to: Circuit/System Testing

• Go to next step: If the DTC is not set