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:
- B34 Engine Coolant Temperature Sensor
- B65 Intake Manifold Pressure and Air Temperature Sensor
- B75C Multifunction Intake Air Sensor
- B115 Vehicle Speed Sensor
- B131 Exhaust Temperature Sensor
- Q14 Exhaust Gas Recirculation Valve
- Q17 Fuel Injector
- 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
- Ignition/Vehicle - Off
- Disconnect the electrical connector: B131A Exhaust Temperature Sensor 1 & B131B Exhaust Temperature Sensor 2
- Test the resistance between the test points: Signal terminal 1 & Low Reference terminal 2
- Verify the value is within the range listed in the table: Temperature Versus Resistance (B131A Exhaust Temperature Sensor 1)
, or Temperature Versus Resistance (B130B Exhaust Gas Recirculation Temperature Sensor 2)
, or Temperature Versus Resistance (B130A Exhaust Gas Recirculation Temperature Sensor and B131B, B131C Exhaust Temperature Sensor 2, 3)
- If not in the specified range
Replace the appropriate component: B131 Exhaust Temperature Sensor
- Go to next step: If in the specified range
- If not in the specified range
- Verify the following conditions do not exist:
- Air Cleaner Element - Missing/Restricted
- Exhaust System - Leaking/Restricted - Refer to: Exhaust Leakage , or Restricted Exhaust
- Induction System - Leaking/Restricted - Refer to: Charge Air Cooler Diagnosis
- If a condition exists
Repair as necessary
- Go to next step: If no condition exists
- Perform the scan tool function: Particulate Filter Service Regeneration .
- Verify sensor 2 is at least 100°C (180°F) warmer than sensor 1:
- Exhaust Gas Temperature Sensor
- Exhaust Gas Temperature Sensor 2
- If sensor 2 is not at least 100°C (180°F) warmer than sensor 1
Replace the component: Catalytic Converter
- Go to next step: If sensor 2 is at least 100°C (180°F) warmer than sensor 1
- 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: Catalytic Converter
- Go to next step: If the DTC does not set
- If the DTC sets
- All OK.