Need help with a failed EGR Valve - 2004 Chrysler Town and Country?

Question

Auto Zone gave me a diagnostics code of P0406 which says that the PCM has determined that the voltage signal from EGR sensor A is too high for the current engine operating conditions. (my check engine light went on this morning after about 1 minute of starting my car)

It says probable causes are either a failed EGR Position Sensor, an open or short circuit condition, a failed EGR Valve, a Failed EGR Pressure Sensor, or a Failed EGR Position Sensor.

How do I know which one it is? Is there something I can do to narrow down what the issue is?

Answer 1

Check your warranty information, may be covered.