Jerky at constant speed

[pete l]

Hi all,

my 3 hybrid can be a bit jerky trying to keep a steady speed, around 45mph, in HEV mode, in EV mode it's fine.

Has anyone else had this ?

Pete

 

[andrewjoseph]

I'm new to hybrids but my car is not jerky. I am however still getting used to the regen happening when I ease of the accellerator. Maybe this is what you are feeling?

 

[pete l]

Definitely jerky, wants to go but doesn't want to go. Can be very jerky, only around this speed and only in hev mode

 

[Chinook]

I've noticed this on mine it feels like it can't make up it's mind whether it wants to be in HEV mode or EV

 

[Deleted member 21808]

Mine does it at about a steady 40mph, I think its the car not deciding what gear to be in. I've read somewhere it's quite common for this car.

 

[Chinook]

Mine does it at about a steady 40mph, I think its the car not deciding what gear to be in. I've read somewhere it's quite common for this car.

Could be John i think the car would benefit from 2 more gears

 

[Emanuel]

I have the same problem with my MG ZS, since it has the same hybrid engine. When I first bought it in March 2025, the transition from EV to HEV was completely smooth and unnoticeable, but after about 7,000 miles I started experiencing this strange issue as well, at a steady speed of 40 mph. Even during acceleration from 0, when it reaches that speed, there’s a noticeable jerk. I’ll take it to the service center in two months and see what they say.

 

[pete l]

Mine only does it when the energy flow is yellow. I don't know what that means though.

 

[Deleted member 21808]

Mine only does it when the energy flow is yellow. I don't know what that means though.

Yellow = Engine power to wheels or batteries.
Blue = Battery power to wheels
Turquoise = Regen to batteries.

I think.......!

 

[Emanuel]

It seems to be getting worse. I can’t tell whether it’s the engine failing to deliver consistent power at that speed, the automatic transmission clutch, or the electronic control unit. I’ll take it in for maintenance in December and see what they say. The car is only 8 months old. I don’t know how common this problem is, or if I’m one of the few cases.