Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Ignition - On/Vehicle - In Service Mode
- Verify there are no DTCs set related to the following component/system:
- B23 Camshaft Position Sensor
- B34 Engine Coolant Temperature Sensor
- B52 Heated Oxygen Sensor
- B74 Manifold Absolute Pressure Sensor
- B75C Multifunction Intake Air Sensor
- B150 Fuel Tank Pressure Sensor
- B198 Fuel Composition Sensor
- Q12 Evaporative Emission Purge Solenoid Valve
- Q17 Fuel Injector
- Evaporative Emission (EVAP) System
- Engine Misfire
- If a related DTC is set
- 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
- Exhaust System - Leaking/Missing components/Restricted - Refer to: Symptoms - Engine Exhaust
- Fuel - Contaminated/Poor Quality - Refer to: Alcohol/Contaminants-in-Fuel Diagnosis
- Fuel System - Leaking - Refer to: Fuel System Diagnosis (except NPP) , or Fuel System Diagnosis (NPP)
- Oil consumption - Refer to: Oil Consumption Diagnosis
- Positive Crankcase Ventilation System - Refer to: Crankcase Ventilation System Inspection/Diagnosis
- Rich fuel mixture. - Refer to: Fuel Injector Diagnosis
- 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
- 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
- If a condition exists
- Verify a condition does not exist with the component: Exhaust System
Leaking/Loose Clamps/Missing components/Restrictions/Visible Damage
- If a condition exists
Repair or replace as necessary
- Go to next step: If no condition exists
- If a condition exists
- Verify a condition does not exist with the component: Catalytic Converter
- A rattling sound indicates internal damage.
- Cracks or holes in the catalytic converter housing.
- Restrictions/Visible Damage
- Severe discoloration caused by excessive temperatures
- If a condition exists
Replace the component: Catalytic Converter
- Go to next step: If no condition exists
- All OK.