Help with CEL P2CEF code

[Rainier]

Got the word that "thermostat stuck" is the issue. Replacement is the fix. Seems they've had a few of these with this issue. ....

Same situation here (US I4). Any further updates from anyone?

I'm hoping this is a bad batch of thermostats (rather than sand in the coolant system ).

 

[gcmak]

Same situation here (US I4). Any further updates from anyone?

I'm hoping this is a bad batch of thermostats (rather than sand in the coolant system ).

how many miles did you have on the car when the error appeared?

 

[Rainier]

how many miles did you have on the car when the error appeared?

Approx 1400 miles, CEL on then automatically turned off after a few start - stop cycles, then fine for a bit and again on and auto cleared itself.

I'm not sure if it just needs to 'settle in' and wont happen again, however dealer will replace (2, upper and lower I think?) thermostats in a few days when parts arrive.

Lotus did not mention anything about sand in the coolant to my dealer.

I did see the video in this thread and find it hard to believe that AMG would still have a sand issue given that the video shows people complaining about it at least 2 years ago in Mercedes cars, but who knows...

 

[Ryan_929]

CEL came back this weekend. I’m taking it back to Lotus on Friday. So far it’s come on 4 times from 100 miles to current 550 miles. Cleared the first 3 and left this last one. I’ll let y'all know what the results are.

 

[yk793]

I read in the FB forum twice from two different I4 owners about the code. Hope it all gets sorted and everyone can enjoy this special car problem free..

 

[MajHall04]

Well add me to the thermostat issue! Car was purchased in December and has 1900 miles. I hope it’s not the sand issue but I suspect it is.

 

[ToonFan]

3 week update. Both thermostats are being replaced. Then another flush and then a "spirited" drive rest and repeat sequence to make sure everything is all good. It's taken a bit to get the parts and go through the process. Fortunately, i have other cars to play with. Note- if you get the check engine light; don't sit on it. Get it scheduled and fixed.

 

[MajHall04]

Well I’m looking at a couple weeks minimum to get my car back….