P2CEF fault code?

[MajHall04]

Drive the car today and was switching between sport and track mode. RPM shot up to 6k rpm with little ga peddle applied. Afterwards yellow check engine light came on. Car still drives fine. Can’t find what P2CEF is?

 

[geoffbland]

Drive the car today and was switching between sport and track mode. RPM shot up to 6k rpm with little ga peddle applied. Afterwards yellow check engine light came on. Car still drives fine. Can’t find what P2CEF is?

P2CEF OBD-II Code

Information and consumer reports for OBD-II Code P2CEF.

dot.report

 

[Ryan_929]

I got the same code last week. Cleared it and it came back within 20 miles of driving. Cleared it again and it’s currently at the dealership for troubleshooting. This is what my scanner shows… I’ll let you know what Lotus says when I pick it up.

 

[MajHall04]

I got the same code last week. Cleared it and it came back within 20 miles of driving. Cleared it again and it’s currently at the dealership for troubleshooting. This is what my scanner shows… I’ll let you know what Lotus says when I pick it up.View attachment 63391

I got the same code last week. Cleared it and it came back within 20 miles of driving. Cleared it again and it’s currently at the dealership for troubleshooting. This is what my scanner shows… I’ll let you know what Lotus says when I pick it up.View attachment 63391

cleared mine. Only drove 10 miles but hasn’t come back.

 

[ToonFan]

Check engine light still on the dash when I took the car out this morning. Stopped for an hour appointment and when I started her back up, no check engine light. I have not cleared any codes as it has its service tomorrow. Strangely, the car seemed more responsive, even in tour mode than it had since the code appeared last week. I'm puzzled.

 

[MajHall04]

Mine came back on after about 45 miles in sports mode

 

[MajHall04]

I got the same code last week. Cleared it and it came back within 20 miles of driving. Cleared it again and it’s currently at the dealership for troubleshooting. This is what my scanner shows… I’ll let you know what Lotus says when I pick it up.View attachment 63391

Did they dealer tell you what was the issue?

 

[Neil D.]

Any more information on this code?
thanks
Neil

 

[MajHall04]

Any more information on this code?
thanks
Neil

Both thermostats need to be replaced. Parts are stateside. Still waiting on them to finish the car. It’s been two weeks so far. This code may be an indication of residual sand in the engine casting.

 

[Aforst]

Drive the car today and was switching between sport and track mode. RPM shot up to 6k rpm with little ga peddle applied. Afterwards yellow check engine light came on. Car still drives fine. Can’t find what P2CEF is?

How many miles on your car?

 

[MajHall04]

How many miles on your car?

Around 1900. 1500 when the CEL first came on.

 

[Ryan_929]

Just in case anyone is looking for info to give the dealer to direct them in the right direction; Here is a TSB from Mercedes addressing the concern in the M139.

It’sTSB LI20.10-P-076206

https://static.oemdtc.com/NHTSA-PDF...4MzcyMzYkbzEkZzAkdDE3NDg4MzcyMzYkajYwJGwwJGgw

 

[Neil D.]

Thank you for your replies.
Neil