I have a Ranger with a 3.0L that keeps getting the P0401 code. The EGR valve, TPS and DPFE has been replaced among other things. Still gives P0401 code. Transmission acts up when light is on. Either shifts too fast into over-drive before 30 MPH or jumps in and out of over-drive going down the inter-state at around 60 MPH. As long as light is not on, trans does just fine. Already dropped $700.00 into all the work I have had done but still not fixed. PLEASE! Someone help me!
I would just trade the truck but it has sentimental value. My dad had the truck when he passed away a year ago, so I would like to get it fixed.