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The actual problem is likely the DPFE sensor (differential pressure feedback egr sensor) it is a very common problem on these but you may also end up replacing the hoses going to it, there are two hoses going to the sensor the one that hooks to the exhaust and is closest to the engine is considered the up stream. This sensor is located on the drivers side of the engine a little towards the back and has two small hoses going to it and a electrical plug, pic below of sensor there are a few different types but they are similar.
Thank you very much,
I will try and see if this fixes my problem.