Engine cuts out/stalls

[d_drive1]

Hi,

First ever Seat and love it but it I’ve got a problem already.
I purchased a Seat Leon FR Sport back in May. This is a 74 plate reg. Since having the car, I’ve noticed, now 6 or 7 times, that the engine cuts out while driving at low speeds when approaching, or pulling away from roundabouts and junctions. It isn’t a typical stall as the car already tends to be slowly moving. The dash eventually then tells me to ‘manually restart the engine’. To start with, thought it was me!

I’ve had it back at my local dealership. The car was looked over and the computer checked for errors. No fault codes were found. They also said the Seat technicians were unable to replicate the fault. I was told that they had seen similar issues before with the cars but no obvious fault was found. Has anyone heard of this?

Couple of weeks ago, the car stalled at low speed as I was going round a mini-roundabout. The car didn’t need to come to a complete stop at the junction. I lost all power and it took me two attempts to get the car restarted. This was dangerous and I was limping around the mini roundabout with traffic coming. I had to pull over as soon as I could to get the car restarted.

After the visit to the dealership, I am at a loss because they can’t carry out a repair as no fault is being shown but there clearly is a problem here.

I’ve been manually disabling the start/stop assist at the start of every journey to see if this helps. However, today, the start/stop was disabled and the engine cut out again after I had switched from second to first gear. I was promoted with the same message: ‘manually restart engine’. This was while approaching traffic lights which were red.

Has anyone heard of this?

Thanks in advance!

 

[BoomerBoom]

Sounds like a fault, not anything related to the stop start system, could be fuel pressure or one of a hundred other things.

If no fault code is shown then you will struggle to get it fixed, or even believed by the stealership - you'll need proof to escalate it so perhaps a dashcam running all the time?

Don't be fobbed off by the stealer, they don't get paid unless they can prove a warranty fault so won't do any work without proof. Once you have the proof then insist they investigate all the engine systems to eliminate the cause, threaten to reject the car if they don't.

 

[James_R]

Try an alternative dealership, but when you you drop the vehicle off, insist on driving the car and demonstrating the fault to a member of staff so they have some idea of what's going on when it faults.

If they take the vehicle in and drive it but it doesn't fault then they're going to declare there is no fault at the time if testing.
Unfortunately I dare say they can't have a technician driving about in your vehicle all day only to come up empty handed.

Give them as much information as possible about the concern and they have a better chance of getting to the bottom of it.

 

[Swanie]

Refer to my post of 9/7/25 appears to be similar issue to yours. At first I was criticising my daughters driving until I drove myself.
Currently monitoring system with start stop disabled and again with it enabled.

 

[Jowy11]

Hi,

First ever Seat and love it but it I’ve got a problem already.
I purchased a Seat Leon FR Sport back in May. This is a 74 plate reg. Since having the car, I’ve noticed, now 6 or 7 times, that the engine cuts out while driving at low speeds when approaching, or pulling away from roundabouts and junctions. It isn’t a typical stall as the car already tends to be slowly moving. The dash eventually then tells me to ‘manually restart the engine’. To start with, thought it was me!

I’ve had it back at my local dealership. The car was looked over and the computer checked for errors. No fault codes were found. They also said the Seat technicians were unable to replicate the fault. I was told that they had seen similar issues before with the cars but no obvious fault was found. Has anyone heard of this?

Couple of weeks ago, the car stalled at low speed as I was going round a mini-roundabout. The car didn’t need to come to a complete stop at the junction. I lost all power and it took me two attempts to get the car restarted. This was dangerous and I was limping around the mini roundabout with traffic coming. I had to pull over as soon as I could to get the car restarted.

After the visit to the dealership, I am at a loss because they can’t carry out a repair as no fault is being shown but there clearly is a problem here.

I’ve been manually disabling the start/stop assist at the start of every journey to see if this helps. However, today, the start/stop was disabled and the engine cut out again after I had switched from second to first gear. I was promoted with the same message: ‘manually restart engine’. This was while approaching traffic lights which were red.

Has anyone heard of this?

Thanks in advance!

Hi, sorry to hear this. Did you ever get the Leon fixed/diagnosed? I got a 25 plate Leon FR black edition 2 months ago and am unfortunately having the same problem, has happened over 8 times now
Garage unable to diagnose fault either so am currently stuck with an unsafe car.
Thanks.

 

[Swanie]

Hi,

First ever Seat and love it but it I’ve got a problem already.
I purchased a Seat Leon FR Sport back in May. This is a 74 plate reg. Since having the car, I’ve noticed, now 6 or 7 times, that the engine cuts out while driving at low speeds when approaching, or pulling away from roundabouts and junctions. It isn’t a typical stall as the car already tends to be slowly moving. The dash eventually then tells me to ‘manually restart the engine’. To start with, thought it was me!

I’ve had it back at my local dealership. The car was looked over and the computer checked for errors. No fault codes were found. They also said the Seat technicians were unable to replicate the fault. I was told that they had seen similar issues before with the cars but no obvious fault was found. Has anyone heard of this?

Couple of weeks ago, the car stalled at low speed as I was going round a mini-roundabout. The car didn’t need to come to a complete stop at the junction. I lost all power and it took me two attempts to get the car restarted. This was dangerous and I was limping around the mini roundabout with traffic coming. I had to pull over as soon as I could to get the car restarted.

After the visit to the dealership, I am at a loss because they can’t carry out a repair as no fault is being shown but there clearly is a problem here.

I’ve been manually disabling the start/stop assist at the start of every journey to see if this helps. However, today, the start/stop was disabled and the engine cut out again after I had switched from second to first gear. I was promoted with the same message: ‘manually restart engine’. This was while approaching traffic lights which were red.

Has anyone heard of this?

Thanks in advance!

 

[Swanie]

Hi,

First ever Seat and love it but it I’ve got a problem already.
I purchased a Seat Leon FR Sport back in May. This is a 74 plate reg. Since having the car, I’ve noticed, now 6 or 7 times, that the engine cuts out while driving at low speeds when approaching, or pulling away from roundabouts and junctions. It isn’t a typical stall as the car already tends to be slowly moving. The dash eventually then tells me to ‘manually restart the engine’. To start with, thought it was me!

I’ve had it back at my local dealership. The car was looked over and the computer checked for errors. No fault codes were found. They also said the Seat technicians were unable to replicate the fault. I was told that they had seen similar issues before with the cars but no obvious fault was found. Has anyone heard of this?

Couple of weeks ago, the car stalled at low speed as I was going round a mini-roundabout. The car didn’t need to come to a complete stop at the junction. I lost all power and it took me two attempts to get the car restarted. This was dangerous and I was limping around the mini roundabout with traffic coming. I had to pull over as soon as I could to get the car restarted.

After the visit to the dealership, I am at a loss because they can’t carry out a repair as no fault is being shown but there clearly is a problem here.

I’ve been manually disabling the start/stop assist at the start of every journey to see if this helps. However, today, the start/stop was disabled and the engine cut out again after I had switched from second to first gear. I was promoted with the same message: ‘manually restart engine’. This was while approaching traffic lights which were red.

Has anyone heard of this?

Thanks in advance!

 

[Swanie]

Refer my posts 9/7/25 and 21/7/25 illustrating same concer. Monitoring issue with stop start on then off, with stop start on over last three weeks appears to have been ok, my daughters car so can only accept what she tells me.
i was in car Monday on a day out approx ninety miles and on two occasions car cut out, first when stationery at traffic lights, stop start was working, went to move off and engine cut out. Second time approaching round about slowing down for approaching trafiic engine cut out, this was ok as had to stop for traffic, engine restarted on second atempt.
Car has been at dealership, no fault found, continuing to monitor concern.