Get a short length of vac tubing & test your EGR valve. Start your car, pull the vac tube off the top of the EGR, install your spare and put a vacuum on it. Should be able to generate the appropriate vac yourself without any special tools.
If the car sputters &/or stalls, your EGR is likely OK. You should also be able to hold the vacuum without having to re-generate it.
Assuming you pass the above test, you saved money. Now you can zero in on the DPFE sensor below the EGR valve about 5 inches or so. It's bolted directly to the block with two small bolts, and two hoses and an electrical connector going to it. Kinda tucked under that EGR & a bit tricky to get to, but overall easy to replace yourself. IF YOU NEED TO. First check those hoses, make sure they're in place and in good shape.
If the hoses are off, you may have plugged up cats & failing pre-cats. If everything checks out, go ahead & replace the DPFE, especially if it has an aluminum housing. The new ones will be plastic & less likely to corrode.
