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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 27 (3.0L Diesel - DTCS P2016-00 To P208D-00) >> DTC Troubleshooting >> P203E-00-REDUCTANT Level Sensor 1 Circuit Intermittent/Erratic >> 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 
    NOTE:

    Before beginning this Diagnostic Tree, an inspection of the DEF Tank is required to verify the following conditions:

    • The fluid level in the DEF Tank must be greater than 1/4 full.
    • The DEF Tank must not be filled all the way to the top (slight air pocket present).
    • The temperature of the fluid in the DEF Tank must be greater than 0°C (32°F).
    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. Ignition on, engine not running.
    4. With the scan tool, erase DTCs in the Powertrain Control Module (PCM).
    5. Perform several ignition cycles turning the ignition off for at least 60 seconds between each cycle.
    6. Start the engine and allow to reach operating temperature.
    7. Test drive the vehicle under normal operating conditions for a minimum of 10 km (6.2 mi.) on roads with less than a 4% grade.
    8. 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 AN ACTIVE DTC 
    NOTE:

    Before beginning this Diagnostic Tree, an inspection of the DEF Tank is required to verify the following conditions:

    • The fluid level in the DEF Tank must be greater than 1/4 full.
    • The DEF Tank must not be filled all the way to the top (slight air pocket present).
    • The temperature of the fluid in the DEF Tank must be greater than 0°C (32°F).
    1. Ignition on, engine not running.
    2. With the scan tool, erase DTCs in the Powertrain Control Module (PCM).
    3. Perform several ignition cycles turning the ignition off for at least 60 seconds between each cycle.
    4. Start the engine and allow to reach operating temperature.
    5. Test drive the vehicle under normal operating conditions for a minimum of 10 km (6.2 mi.) on roads with less than a 4% grade.
    6. With the scan tool, read the PCM DTCs.

      Did the DTC return as Active or Pending?

      Yes 

      • Go To  3

      No 

      • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
      • Check the fluid level in the DEF Tank. If the tank is overfilled drain the tank and refill to the appropriate level. Do not overfill the DEF Tank, a slight air pocket must be at the top of the tank. Inform the customer of the proper DEF Tank refill level.
  3. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any DEF Level circuit Low or High DTCs or DEF Heater-related DTCs Active or Pending?

      Yes 

      No 

      • Go To  4
  4. VISUALLY INSPECT FOR ICE FORMATION IN THE DEF TANK 
    NOTE:

    Ice forming on the inside of the DEF Tank can set this DTC.

    1. Remove the filler tube to the DEF Tank and visually inspect for the presence of ice crystals forming.

      Are there ice crystals forming within the DEF system?

      Yes 

      • Allow the vehicle to remain inside the repair facility long enough for the ice within the DEF System to dissolve.
      • Go To  1

      No 

      • Go To  5
  5. INSTALL A NEW DEF LEVEL/TEMPERATURE SENSOR ASSEMBLY (ENTIRE DEF TANK) AND RETEST FOR DTC 
    1. Turn the ignition off.
    2. Install a new DEF Level/Temperature Sensor Assembly in accordance with the Service Information. (Must replace entire DEF Tank).
    3. Turn the ignition on.
    4. With the scan tool, erase PCM DTCs.
    5. Start the engine and allow to reach operating temperature.
    6. Test drive the vehicle during normal operating conditions.
    7. With the scan tool, read PCM DTCs.

      Does the scan tool display this DTC?

      Yes 

      • Go To  6

      No 

      • Test complete. If P241D was also present, it will be necessary to reset the SCR Timer: Using the scan tool, navigate to Misc. Functions> SCR Extend Mileage W Active Fault (and reset the Timer).
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  6. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all PCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    10. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. If P241D was also present, it will be necessary to reset the SCR Timer: Using the scan tool, navigate to Misc. Functions> SCR Extend Mileage W Active Fault (and reset the Timer).
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .

      No 

      • The wiring or poor connection problem has been repaired. If P241D was also present, it will be necessary to reset the SCR Timer: Using the scan tool, navigate to Misc. Functions> SCR Extend Mileage W Active Fault (and reset the Timer).
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
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