Possible Causes

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.

Possible Causes
DEBRIS PLUGGING THE PRESSURE TUBE
DEBRIS PLUGGING THE PRESSURE SENSOR PORTS ON THE EXHAUST MANIFOLD
EXHAUST PRESSURE 1/1 SENSOR

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to STANDARD PROCEDURE .

OTHER DTCS
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Are there any other DTCs?
  
  Yes
  - Repair all other DTCs first.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 2
CHECK THE EXHAUST PRESSURE 1/1 SENSOR TUBE AND PRESSURE SENSING PORTS
1. Remove the steel tube between the Exhaust Manifold and the Exhaust Pressure 1/1 Sensor port.
  Is the pressure tube and pressure sensor ports located in the manifold free from debris?
  
  Yes
  - Go To 3
  No
  - Clean the tube and pressure sensing ports.
  - Go To 3
CHECK THE EXHAUST MANIFOLD PRESSURE (EMP) SENSOR
1. Remove the EMP Sensor from the Exhaust Manifold.
  Is the EMP sensor free of debris?
  
  Yes
  - Go To 4
  No
  - Remove debris from the Exhaust Manifold Pressure sensor.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK THE AIR INLET/CHARGE AIR/EXHAUST GAS RECIRCULATION FOR LEAKS
1. Check vehicle/engine for leaks of inlet air (Air Filter to Turbocharger), Charge Air (Turbocharger to Intake Manifold), or EGR gases (Exhaust Manifold to Intake Manifold). Refer to DIAGNOSIS AND TESTING, 6.7L .
  Were there any leaks detected?
  
  Yes
  - Repair leak condition.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
EXHAUST PRESSURE 1/1 SENSOR
1. Turn ignition switch on.
2. Wait five seconds after ignition switch is turned on.
3. With the scan tool, read DTCs.
  Is P0471 stored?
  
  Yes
  - Go To 6
  No
  - Replace the Exhaust Gas Pressure Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
CHECK THE EXHAUST PRESSURE 1/1 SENSOR OPERATION
1. With the scan tool, erase DTCs.
2. Start the engine and let it idle for one minute.
3. With the scan tool, monitor the Exhaust Pressure 1/1 Sensor reading.
  Does the value fluctuate slightly, indicating the sensor is not stuck?
  
  Yes
  - Repair complete.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Replace the Exhaust Pressure 1/1 Sensor.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .