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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 433 (6.7L Diesel - DTCS P0008 To P040D - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P0299-Manifold Pressure Sensor Out Of Range Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. OTHER DTCS 
    1. Turn the ignition on.
    2. With the scan tool, read and record the freeze frame data.
    3. With the scan tool, read the Engine DTCs.

      Are there any DTCs set for the Turbocharger system, BARO Sensor, Inlet Air Pressure Sensor, or Manifold Pressure Sensor?

      Yes 

      • Repair other DTCs before proceeding.

      No 

      • Go To  2
  2. CHECK THE INLET AIR PRESSURE SENSOR 
    1. Turn the ignition off.
    2. Connect a mechanical intake manifold pressure gauge to the engine, as close to the Inlet Air Pressure Sensor as possible.
    3. Start the engine.
    4. With the scan tool, monitor the Inlet Air Pressure Sensor reading.

      Is the scan tool reading within 2.5 psi of the mechanical intake manifold pressure gauge?

      Yes 

      • Go To  3

      No 

      • Replace the Inlet Air Pressure/Temperature Sensor in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  3. CHECK THE INTAKE SYSTEM FOR LEAKS OR RESTRICTIONS 
    1. Perform the INTAKE AIR SYSTEM PRESSURE TEST diagnostic procedure. Refer to DIAGNOSIS AND TESTING, 6.7L .

      Were any Intake System leaks or restrictions found?

      Yes 

      • Perform the appropriate repair. Refer to appropriate service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. CHECK THE CHARGE AIR COOLER 
    1. Remove and clean the Charge Air Cooler with approved Mopar® EGR system cleaner.
    2. Reinstall the Charge Air Cooler.
    3. With the scan tool, erase DTCs.
    4. Turn the ignition off for 75 seconds.
    5. Start the engine.
    6. Test drive the vehicle. With the scan tool in Data Display, verify that the engine operating mode is normal.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Replace the Charge Air Cooler in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Repair complete.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
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