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I sold the truck last year but stay in touch with the owner and the problem has not returned. As I recall, the problem only occurred when I was between accelerating and decelerating- like maybe driving on a road with a slight downgrade where I was maintaining speed but there was no load on the...

I currently own a company 2019 Ranger XLT bought new 11/2019 with around 30,000 miles, a company 2021 Ranger Lariat with 2,000 miles, and a personal 2021 Explorer with 12,000 miles and here are my impressions: 1. Dealers suck and cannot be trusted. Most only care care about getting your vehicle...

I parked the truck in a heated garage overnight and the system is back to normal.

We got some winter weather recently and at the same time my 2021 Lariat has had to stay outside for a few nights. Yesterday and today I find that my doors will not unlock when I grab the door handles (Intelligent Access). Any ideas?

Maybe change the EGR yourself and if this fixes the problem, refuse to pay them anything.

Yes, it should absolutely be free when the truck has a known issue and is still under warranty. The whole diagnosis for Doug's truck is likely crap to sell unneeded work. A new EGR, covered under warranty, including the diagnostics should be paid for by Ford. There is a valid reason why...

Looking at the diagram in the link I provided, it looks like they replaced an assembly. I assume the DPFE is part of this assembly. The service manager told me it is part of the EGR system. The work order states "faulty DPFE" The other day when I test drove the truck I wrote down exactly what...

Just picked up the truck. Part number listed as LB5Z9J433B https://parts.lakelandford.com/p/Ford__/EGR-vacuum-CONTROL-VALVE---EXHAUST-GAS-RECIRCULAT/91072122/LB5Z9J433B.html "all cylinders have history of random misfire"

No part number, sorry.

I raised heck with them and they finally got the truck in this morning. A couple of hours later the problem is identified and part ordered. We should have been here 2 weeks ago. In fairness, the dealership is short-handed like we all are and struggling to keep up.

Fixed! Just got back from the dealership after being asked to come in and test drive my Ranger. Smooth! Problem was multiple cylinder miss-fires that were not throwing codes but showed up for the tech. The culprit part temporarily swapped from another truck to try is called a Differential...

You do not have the problem I have. I can downshift to raise rpms and still get the bucking if I try to maintain speed on a level road. I am now feeling the problem on the interstate at 70 MPH when I crest a hill and the truck momentarily coasts.

Interesting! Mine is at the dealer for nearly 3 weeks or I would try this. My truck is always parked on level ground and often goes several day without being driven. Almost sounds fluid-related. Do you know if your transmission fluid has been checked?

Sounds exactly like what is happening with my truck. My Ranger has around 23,000 miles on it. Had TSB 20-2339 done around 2 months ago which made no difference.

No noticeable change in RPMs that I can remember. Would an engine issue like these cause the ECM or PCM (?) to throw a code?

1. Not lugging, though it feels kind of like lugging would just before the engine stalls. Problem occurs when truck is neither accelerating or decelerating. The moment you step on the gas, the problem is gone. 2. Tow mode made a negligible difference. 3. I am the only driver of this vehicle and...

Haven't checked in here in a couple of weeks and now see a bunch of threads discussing what I believe to be the same defect in various forms. "Bucking" is a good word to describe what my 2019 Ranger started to do a couple of months ago, or maybe longer than that. It started out barely noticeable...

Yes! This is turning out to be an epidemic. There are a bunch of discussions here about this problem in various forms. Mine started out barely noticeable and gradually got worse to the point where I wasn't sure I should drive it. My dealer is at least acknowledging the problem now.

Update: Two weeks ago the commercial sales manager and my commercial sales rep from our local Ford dealer came to my office and picked up the truck. I received a call from the rep Wednesday telling me they now have four (!) Rangers there with the same problem and Ford does not know what to do...