Circuit/System Verification

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Ignition - On / Vehicle - In Service Mode
Verify there are no DTCs set related to the following system/component:
- B34 Engine Coolant Temperature Sensor
- B52 Heated Oxygen Sensor
- B65 Intake Manifold Pressure and Air Temperature Sensor
- B75C Multifunction Intake Air Sensor
- B107 Accelerator Pedal Position Sensor
- B198 Fuel Composition Sensor
- Q17 Fuel Injector
- Q38 Throttle Body
- Engine Misfire
- Fuel Trim System
- If a related DTC is set
  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If a related DTC is not set
Verify the following conditions do not exist:
- Coolant consumption - Refer to:Loss of Coolant
- Oil consumption - Refer to:Oil Consumption Diagnosis
- If a condition exists
  Repair or replace as necessary.
- Go to next step: If no condition exists
Verify a condition does not exist with the component:B52 Heated Oxygen Sensor - Loose/Poor Connection/Visible Damage
- If a condition exists
  Repair or replace as necessary.
- Go to next step: If no condition exists
Verify a condition does not exist with the component:Exhaust System & Three-Way Catalytic Converter
- Cracked
- Internal component rattle
- Leaking - Refer to:Exhaust Leakage
- Loose Clamps
- Missing components
- Restrictions - Refer to:Restricted Exhaust
- Severe discoloration caused by excessive temperatures
- Visible Damage
- If a condition exists
  Repair or replace as necessary.
- Go to next step: If no condition exists
All OK.