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Home >> Jeep >> 2022 >> Gladiator Mojave, Part Time T/Case Control, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (3.0L Diesel - DTCS P045D-00 To P0500-00) >> DTC Troubleshooting >> P04DE-00-Cold Start EGR 1 Flow Excessive Detected >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

      • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
  2. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any Mass Air Flow Sensor DTCs active or pending?

      Yes 

      No 

      • Go To  3
  3. VISUALLY INSPECT THE AIR FILTER FOR EXCESSIVE DIRT OR DEBRIS 
    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 

      No 

      • Go To  4
  4. CHECK THE AIR INTAKE AND EXHAUST SYSTEMS FOR A RESTRICTION 
    1. Visually inspect the fresh air inlet tube for a blockage due to snow, ice or dirt buildup.
    2. Visually inspect the intake system, exhaust system and related tubes and connections.
      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.

      Were any problems found?

      Yes 

      No 

      • Go To  5
  5. CHECK THE INTAKE AIR SYSTEM FOR LEAKS 
    1. Perform the Engine Diagnosis and Testing INTAKE AIR SYSTEM LEAK DETECTION test procedure. Refer to INTAKE AIR SYSTEM LEAK DETECTION .

      `

      Is there evidence of a leak?

      Yes 

      No 

      • Go To  6
  6. CHECK THE EGR AIR FLOW CONTROL VALVE FOR PROPER OPERATION 
    1. Disconnect the air tube at the inlet port of the EGR Air Flow Control Valve.
    2. Use a mirror to observe the motion of the EGR Air Flow Control Valve.
    3. Turn the ignition on.
    4. The EGR Air Flow Control Valve should open completely without binding with the ignition on.
      NOTE:

      Cycle the ignition on and off several times while observing the operation of the valve.

      Did the EGR Air Flow Control Valve operate correctly and without binding?

      Yes 

      • Go To  7

      No 

      • Replace the EGR Air Flow Control Valve in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  7. CHECK THE EGR COOLER AND TUBES FOR LEAKS OR RESTRICTIONS 
    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 soot 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 

      No 

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