Car shows "limp mode" or "reduced acceleration" warnings (possible ECU issue)

[JClem]

Yeah, I picture the UK as mild drizzle most of the time, but then a lot of the American South is "mostly sunny, with a chance of life-altering floods".

Certainly felt like that today in London.

 

[Stealthinnimbus]

So based on experience today with miltek valve in “mode 1” it definitely causes limp mode and MIL light. Happened repeatedly while pushing hard. Took it out at lunch time and been fine all afternoon. Will be writing to miltek and requesting a refund as its either faulty or doesnt work

 

[whupwhup]

I experienced the reduced acceleration warning and ESC error on a drive on the weekend after driving 1,000 miles. No rain, no wash - car was totally dry. I have 3rd cat delete. It randomly turned on as I was driving slowly through a neighbourhood. Parked locked the car, went for lunch. When I returned, error message gone - drove home 7hour drive - no error again. I assume its something flaky. I guess I’ll wait if it comes up again.

 

[Atlantis Blue Emira]

April 24 build car, I've had it since June and zero issues outside of some paint defects. Well unfortunately today I'm joining the "Engine reduced acceleration" club. No error codes or check engine lights, just a pop up warning followed by the redline reduction. It was 95 degrees in Chicago today and I was in terrible traffic for well over an hour (AC cranking of course), hopefully just a case of things getting too hot?

I'll keep people posted if this was a one time deal or if it continues to pop up.

Could any of this or anyone in the thread comment on if this is an alternator issue?

Reason I asked this question is because my alternator went out and my car died while driving. Look at my original post from before from 2-3 weeks ago.

The summary is we were fitted with 150 amp alternator, as in warmer weather in US, need higher Amp, so the cars require 180 A in the US. That is how I understand it from Lotus.

 

[CHEESE]

I experienced the reduced acceleration warning and ESC error on a drive on the weekend after driving 1,000 miles. No rain, no wash - car was totally dry. I have 3rd cat delete. It randomly turned on as I was driving slowly through a neighbourhood. Parked locked the car, went for lunch. When I returned, error message gone - drove home 7hour drive - no error again. I assume its something flaky. I guess I’ll wait if it comes up again.

I got this the other day after driving about 3 miles. It unexpectedly went back to normal before shutting the car off.

 

[slimjim]

I got this the other day after driving about 3 miles. It unexpectedly went back to normal before shutting the car off.

Just got my car - have only driven it 200 miles. Was driving it in sport mode today (yeah, I know the break in period recommendations but haven’t gone over 4k rpm a lot….), and same thing happened to me. Parked, turned ignition off and then on and it disappeared. Will see if it happens again. Sorry (but relieved) that others are in the same boat.

 

[djprov431]

Happened to me in the 800 mile range during normal driving - shut car down, waited 3 min, restarted, hasn't come back in over 100 miles so far.

 

[Jjrho]

Mine at 2200 miles... car went into same limp/reduced power mode again.... 5th time....today was a cool 65F wx... so my previous 3 posts of this happening in hot wx (100F) at spirited driving only , is now out the window.... fock....

Wtf... what is the solution to this ?, I will try to read the code.... CEL is ON even though it went back to normal operation after restart....

Also, still having issues of car not starting, until I F with the alarm on,off few times..... annoying

Definitely can't get away fast if Jason or Freddie chasing me .... fml

 

[Nova]

I feel like the ESC Service Required error is something different. I had it happen to me once about 300 miles ago. Like others, it went away after a restart.

 

[trackday14]

Mine at 2200 miles... car went into same limp/reduced power mode again.... 5th time....today was a cool 65F wx... so my previous 3 posts of this happening in hot wx (100F) at spirited driving only , is now out the window.... fock....

Wtf... what is the solution to this ?, I will try to read the code.... CEL is ON even though it went back to normal operation after restart....

Also, still having issues of car not starting, until I F with the alarm on,off few times..... annoying

Definitely can't get away fast if Jason or Freddie chasing me .... fml

I’m on my 3rd Mass Airflow Sensor…same issue each time.

 

[Jjrho]

Damn, so that's NOT the issue.... i.e. the dealership has no clue huh ?!?.