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HOMESERVICE MANUALSDODGE AND RAM2023DURANGO R/T PLUS, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 42 (6.2L - DTCS P0443 TO P058A)DTC TROUBLESHOOTINGP0455-EVAP SYSTEM LARGE LEAKDIAGNOSTIC TEST
2023 Dodge and Ram Durango R/T Plus, AWD

Diagnostic Test

2023 Dodge and Ram Durango R/T Plus, AWDSECTION Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR ANY SERVICE BULLETINS THAT APPLY 
    1. Before proceeding with this test procedure, perform any Service Bulletins or PCM Flash updates that relate to this fault code.

      Are there any Service Bulletins or PCM Flash updates available?

      Yes 

      • Perform the applicable Service Bulletins or PCM Flash update.
      • Verify the system is not leaking by leak testing the system, Go To  2

      No 

      • Go To  2
  2. PERFORM THE SMALL LEAK VERIFICATION TEST 
    1. Turn the ignition on.
    2. With the scan tool, navigate to the Small Leak Verification Test routine and follow the instructions on the screen.
      NOTE:

      The routine tests the system using similar methodology as the manual leak evaluation in the next test step with one exception. The routine is based solely on the pressure reading from the FTP Sensor. The ESIM Switch state is not factored into the decision in the routine even though it is solely used for leak detection by the PCM. The ESIM state is shown and documented so that it can be verified for proper operation using the information provided in the table in test step 3 below.

    3. Document the results from each phase recorded in the Small Leak Verification Test routine.

      Small Leak Verification Test results?

      Passed 

      • This indicates that the system may be sealed and not leaking. Compare the results from the routine to the expected results and possible failures in the table below in test step 3. If the system is functioning properly, no attempt at a repair should be performed.

      Failed 

      • Compare the results from the routine to the expected results and possible failures in the table below in test step  3.

      Not available on scan tool or will not run 

      • Go To  3
  3. PERFORM A MANUAL EVALUATION OF THE EVAP SYSTEM FOR A LEAK 
    NOTE:

    For best results when testing the Fuel Tank should have less than 95% of Fuel Tank capacity.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.