I'd been out for a drive with my partner today, coming back home on a country road, when I suddenly realised I was having a loss of power and, when I looked at the instruments, I saw that EPC was illuminated.

I found somewhere to stop and looked in the manual and realised that it had gone into Limp Home mode, but after switching off and on again, the fault light cleared and I was able to drive the 25 or so miles home (carefully!) without problems.

I've contacted my local garage using their online form, so I can get them to check the OBD, but if anyone's got any other useful advice, I'd welcome it.

Don't know if this is your issue, but I had the same symptoms a couple of years ago which was caused by a failing turbo actuator (P334A). Got it replaced at a garage and it's been good ever since

How many miles on the car, when were the spark plugs replaced?. It needs read for any Logged Fault Codes. eg Misfires. It could have had enough in a cycle to have the EPC light show & into Limp Mode. Maybe just not the Engine / Emissions light.

Thanks for the replies.

The car had done about 63,500 at the last MOT in October 2025. I've checked through all the paperwork I got and can't see anything about spark plugs being changed.

The Turbo Actuator was replaced in 2024 (before I bought it).

Unfortunately my local garage doesn't have any availability until the end of next week, so I'm going to have to phone around and see if I can find somewhere else at shorter notice unless there's a way to access the OBD via my phone.

Did it feel like the engine was running rough before the EPC indicator lit up?

If the spark plugs have never been replaced (unlikely) very probably a cause.

Not impossible for the turbo actuator arm to have become 'sticky' again though.

4 minutes ago, Warrior193 said:

Did it feel like the engine was running rough before the EPC indicator lit up?

If the spark plugs have never been replaced (unlikely) very probably a cause.

Not impossible for the turbo actuator arm to have become 'sticky' again though.

Nope, it felt fine, just suddenly a loss of power.

I've got a guy coming round tomorrow to do a diagnostic on it for £60, some places wanted almost three times that or said they couldn't look at it for two weeks!

Well that was quick and painless, thankfully! 👍

It turned out that, when the Turbo Actuator arm was replaced a couple of years ago (before I got the car) the housing hadn't been put back quite right, so it was rubbing on the arm and it had caused enough friction to register as a fault.

A couple of minutes with a screwdriver and pliers and it was moving freely again 

Whilst having my own OBD reader might have told me the problem, I wouldn't have known where to look, so that's £60 well spent.