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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 (6.7L Diesel - DTCS - P21C4 To U1601 - 3500 Cab & Chassis) >> Diagnosis and Testing >> P2457-Exhaust Gas RECIRCULATION Cooling System Performance >> Testing >> Diagnostic Test

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.
  1. OTHER DTCS 
    1. Ignition on, engine not running.
    2. With the scan tool, read DTCs.

      Are there any coolant temperature, fuel system or EGR Valve DTCs?

      Yes 

      No 

      • Go To  2.
  2. ACTIVE DTC 
    NOTE:

    If there are any 5-Volt supply DTCs present, repair those DTCs before proceeding with this test.

    1. Turn the ignition on.
    2. With the scan tool, record all Freeze frame data.
    3. With the scan tool, erase DTCs.
    4. Turn the ignition off for 30 seconds.
    5. Start the engine. It may be necessary to test drive the vehicle.
    6. With the scan tool, read DTCs.

      Did the DTC reset?

      Yes 

      • Go To  3.

      No 

  3. CHECK FOR ENGINE OR FUEL MODIFICATIONS THAT EXCEED OEM SPECIFICATIONS 
    1. Inspect vehicle/engine for signs of Engine or Fuel modifications that exceed OEM specifications.

      Are there signs the customer installed a modification kit that exceed OEM specifications?

      Yes 

      • Return vehicle to customer. Explain that modifying the engine hardware/software may cause the engine to run outside of its normal operating limits.

      No 

      • Go To  4.
  4. CHECK THE EXHAUST GAS RECIRCULATION TEMPERATURE SENSOR 
    1. Turn the ignition off.
    2. Disconnect the EGR Temperature Sensor harness connector.
      NOTE:

      Check connectors - Clean/repair as necessary.

    3. Remove the Temperature Sensor and reconnect the wiring harness connector to the sensor.
    4. Turn the Ignition on, engine off.
    5. Monitor scan tool, while heating the sensor with an external heat source (DO NOT USE OPEN FLAME).

      Does the reading from the sensor increase at least 2.78° C (5° F) on the scan tool?

      Yes 

      • Go To  5.

      No 

      • Replace the EGR Temperature Sensor in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  5. EGR COOLER 
    1. Remove and clean the EGR Cooler with approved Mopar 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, read DTCs.

      Did the DTC reset?

      Yes 

      No 

      • Repair complete.