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Home >> Dodge and Ram >> 2018 >> Durango Pursuit >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (3.6L - DTCS P105D To P2099) >> DTC Troubleshooting >> P1404-EGR Close Position Performance >> Diagnostic Test

Diagnostic Test

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  1. CHECK FOR AN ACTIVE DTC 
    1. Start the engine and allow it to reach operating temperature.
    2. With the scan tool, read DTCs and record on the repair order.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

      • Go To  3
  2. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any EGR Valve Position Sensor or EGR Valve Control DTCs active or pending?

      Yes 

      • Perform the applicable diagnostic procedure(s). Refer to DTC INDEX .

      No 

      • Go To  3
  3. CHECK THE VEHICLE REPAIR HISTORY 
    1. Check the vehicle repair history for previous EGR Valve performance related DTCs within the past 90 days.

      Does the repair history show that the vehicle was in dealership for an EGR Valve performance fault within the past 90 days?

      Yes, and the EGR Valve was cleaned during the previous visit. 

      • Verify that the connector is completely connected. Check the connector terminals for any pushed out, corroded or spread terminals causing a poor or intermittent connection. If the connector is good, replace the EGR Valve Assembly in accordance with the Service Information. The EGR VALVE REPLACED routine must be performed after replacing or cleaning the EGR Valve to reset the zero learn position. Failure to do so will cause a false failure and the P1404 DTC to set. With the scan tool, perform the EGR VALVE REPLACED routine.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      Yes, and the EGR Valve was replaced during the previous visit. 

      • Verify that the connector is completely connected. Check the connector terminals for any pushed out, corroded or spread terminals causing a poor or intermittent connection. If the connector is good, Clean the valve by running Mopar Combustion Chamber cleaner through the engine. The EGR VALVE REPLACED routine must be performed after replacing or cleaning the EGR Valve to reset the zero learn position. Failure to do so will cause a false failure and the P1404 DTC to set. With the scan tool, perform the EGR VALVE REPLACED routine. Test drive the vehicle and verify the DTC does not return. If the fault does not return, check the engine for any fuel or air handling issues that can cause excessive soot or carbon buildup in the engine.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE EGR VALVE FOR CARBON OR SOOT BUILD UP 
    1. Turn the ignition off.
    2. Remove the EGR Valve Assembly.
    3. Visually inspect the EGR Valve stem, disc and passages for signs of damage or excessive carbon build up.

      Does the EGR Valve show signs of excessive carbon build up?

      Yes 

      • Clean and reinstall the EGR Valve Assembly. Also clean the EGR passages by running Mopar Combustion Chamber cleaner through the engine. The EGR VALVE REPLACED routine must be performed after replacing or cleaning the EGR Valve to reset the zero learn position. Failure to do so will cause the P1404 DTC to reset. With the scan tool, perform the EGR VALVE REPLACED routine.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE EGR AND PCM HARNESS CONNECTORS 
    1. Check the EGR and PCM harness connector for conditions that could cause poor terminal contact or voltage leak to other circuits.

      Were any problems found with the harness connectors?

      Yes 

      No, and P1404 is Active or Pending. 

      • Replace the EGR Valve Assembly in accordance with the Service Information. The EGR VALVE REPLACED routine must be performed after replacing or cleaning the EGR Valve to reset the zero learn position. Refer to VALVE, EXHAUST GAS RECIRCULATION (EGR), REMOVAL . Failure to do so will cause a false failure and the P1404 DTC to set.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No, and P1404 is Stored. 

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