Truck threw the code for Insufficient EGR flow. Did the same last summer, both the DPFE sensor and EGR valve were changed. Since I bought the store brand sensor, I'm betting it went bad. My question is, will this also cause the engine to race when the clutch is pressed in? 2000 Ranger, 2.5L, 5 speed, 158,000 miles.

 

My DPFE replacement sensor also died after a year or two.

No idea on the your high idle though.

 

I was wondering if the DPFE was failing, it would send a reading to the IAC and that is what was keeping the idle up.

 

The DPFE sensor has a line to it that connects to the intake manafold, that if cracked can cause a vacuum leak that might cause idle problems & a P0401 code. so when you changed the DPFE & EGR valve last year, did those lines seem ok, or did you replace them & if so, with OEM quality lines????

 

The lines looked ok last year, but I will look at them a lot closer when I get to the truck today or tomorrow.
Thanks,