Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK FOR OTHER DTCS
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Were there any fuel system or air handling sensor DTCs present?
  
  Yes
  - Perform the Diagnostics for those DTCs before continuing with this one.
  No
  - Go To 2
CHECK THE RATIONALITY OF THE EXHAUST TEMPERATURE SENSORS
1. Turn the ignition off for 10 minutes to allow the Exhaust Temperature Sensors to stabilize.
2. Turn the ignition on.
3. With the scan tool check the temperature values of the Exhaust Temperature Sensors.
  Are the Exhaust Temperature Sensors reading within 43°F of each other?
  
  Yes
  - Go To 3
  No
  - Replace the Exhaust Temperature Sensor that is out of range as compared to the others. Refer to SENSOR, EXHAUST TEMPERATURE, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK FOR THE DOC/DPF CATALYST MISSING
1. Visually inspect the aftertreatment exhaust system.
  Is the DOC/DPF Catalyst installed on the vehicle?
  
  Yes
  - Go To 4
  No
  - Replace the DOC/DPF Catalyst in accordance with the service information. Refer to FILTER, DIESEL PARTICULATE, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK FOR DAMAGE TO THE DOC/DPF CATALYST
1. Separate the exhaust and inspect the DOC/DPF Catalyst for internal damage or signs of face plugging.
  Was any internal damage found in the DOC/DPF Catalyst?
  
  Yes
  - Replace the aftertreatment DOC/DPF Catalyst in accordance with the service information. Refer to FILTER, DIESEL PARTICULATE, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace the Exhaust Gas Temperature Sensor 1/3. Refer to SENSOR, EXHAUST TEMPERATURE, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .