I have a 2020 Ford Fusion with a 2.5-liter four-cylinder engine (not turbocharged). It has about 45,000 miles. It has developed a jerking feeling when I try to maintain speed. It is very noticeable at slow speeds, like trying to maintain between 30-40mph. When the jerk happens, the RPM gauge goes up a little and back down. It only happens while driving, never at a stop or while in park. Any ideas what is causing it?
are there codes to read if the check engine light is not on?
Yes, there can be codes without the check engine light turning on. You need to scan the car for codes and it would also be helpful if you could take a snapshot of live data while the problem is occurring.
Got it scanned and no codes are found. Here is a link to a video to show what the RPM gauge is doing (sort for the sideways view!): https://sendvid.com/h8dtqn5v
This was while I was maintaining speed between 50-55mph. Every time the gauge jumps up there is a little jerk, almost like a shifting gears feeling.
Reading codes is just the beginning of diagnostic procedures. Also if it is a transmission problem most generic OBD2 scanners will not read those codes. Did you get a snapshot of live data?
I’m not sure what you mean by a snapshot of live data. What is that?
Thanks. I’ll see if I can get that done.
You need to determine whether this issue is being caused by the engine stumbling or by a transmission problem. The data should shed some light on this.
Get it scanned for codes at an auto parts store and go from there. Could be the engine or the trans or both.
This is probably a dumb question: are there codes to read if the check engine light is not on? None of the dashboard warnings/notifications are on.