Diagnostic Test

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

CHECK FOR ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record environmental data and record all DTCs on the repair order.
3. With the scan tool, erase PCM DTCs.
4. Test drive the vehicle and monitor the scan tool for PCM DTCs.
  Did this DTC set again?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK FOR OTHER DTCS
1. Refer to the recorded DTCs.
  Are there any Mass Air Flow DTCs active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK THE AIR FILTER FOR AIR FLOW RESTRICTION
1. Turn the ignition off.
2. Remove and inspect the Air Filter for soiling or excessive dirt and debris which may cause air flow restriction.
  Were any of these problems found?
  
  Yes
  - Replace the Air Filter element.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 4
CHECK THE AIR INTAKE AND EXHAUST SYSTEMS FOR AIR RESTRICTIONS
NOTE:
Inspect all air intake, crankcase vent and turbocharger related tubes for damage, restriction or poor connection. Any of these conditions can cause this DTC to set.

NOTE:
Inspect the exhaust system and related tubes for damage, restriction or poor connection. Any of these conditions can cause this DTC to set.
1. Inspect the intake system, exhaust system and related tubes and connections.
  Were any problems found?
  
  Yes
  - Repair or replace as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 5
CHECK THE INTAKE SYSTEM FOR AIR LEAKS
1. Remove the Inlet Pressure Sensor.
2. Connect smoke machine to the Inlet Pressure Sensor port in the intake duct and begin injecting smoke into the intake system.
3. Observe all intake system components for evidence of smoke leakage.
  Is there evidence of smoke leakage?
  
  Yes
  - Repair or replace as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 6
CHECK THE EGR COOLER AND TUBES FOR AIR FLOW RESTRICTION
1. Turn the ignition off.
2. Gain access to and inspect the EGR Cooler and both tubes that connect to the EGR Cooler. Check tubes and cooler for damage, leaks, excessive carbon build up and other problems that could restrict or prevent proper exhaust gas flow.
  NOTE:
  Compressed air (at low pressure) can be applied to the lower port of the EGR Cooler. When applying compressed air check for air to flow through cooler and out the upper port. Always wear safety glasses when working with compressed air.
  
  Were any problems found?
  
  Yes
  - Repair or replace as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace the EGR Valve.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .