Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AIR FILTER RESTRICTION
NOTE:
Repair any other EGR related DTCs before proceeding.
1. Examine the Air Filter minder.
  Is the air filter restriction within allowable limits?
  
  Yes
  - Go To 2.
  No
  - Replace the Air Filter in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR INTAKE AIR HEATER RESTRICTION
1. Remove air inlet connection and inspect Intake Air Heater.
  Is the Intake Air Heater restricted?
  
  Yes
  - Clean area and reassemble.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
CHECK FOR EGR SYSTEM LEAK
1. Look for visible signs (soot streaks) of an external EGR system leaks around the V-band clamps and connections. Ensure that all torque is within specifications for alk EGR system components.
  Are there any EGR leaks?
  
  Yes
  - Repair the leak in the EGR system.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK FOR INTAKE AIR SYSTEM LEAK
1. Check for leaks in the Intake Air System. Perform the INTAKE AIR SYSTEM PRESSURE TEST. Refer to Diagnosis and Testing , 6.7L .
  Was an Intake Air System leak found?
  
  Yes
  - Repair the Intake Air System leak.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 5.
CHECK THE THERMOSTAT OUTLET
1. Remove the EGR Outlet Temperature Sensor from the thermostat outlet.
  Is the outlet free of debris?
  
  Yes
  - Go To 6.
  No
  - Remove debris from outlet.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR EGR COOLER LEAK
1. Verify EGR Cooler is not leaking.
2. Check for coolant in EGR plumbing, engine overheat fault codes, and low coolant level.
  Are there signs of an EGR Cooler leak?
  
  Yes
  - Replace the EGR Cooler in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 7.
CHECK FOR EGR CROSSOVER TUBE RESTRICTION
1. Remove EGR Crossover tube from EGR Cooler and EGR Valve.
2. Inspect tube for restriction.
  Is the EGR crossover tube restricted?
  
  Yes
  - If possible, clean the tube. If not, replace the tube.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 8.
CHECK FOR EGR COOLER FOULING
1. Remove and clean the EGR Cooler with approved Mopar R EGR System cleaner.
2. Reinstall the EGR Cooler.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Start the engine. It may be necessary to test drive the vehicle.
6. With the scan tool, check for a one trip fault logged against DTC P0401.
  Is there a one trip fault logged against DTC P0401?
  
  Yes
  - Replace the EGR Cooler in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Test complete.