Thats why I disconnected mine, Not worth what it offers for piece of mind, Buyers Beware!
Reduced Acceleration
- Thread starter ALI5T4IR
- Start date
Mine just had this CEL driving back from work yesterday. March 2025 build, completely stock 450 miles on ODO. Cruising on the freeway 75 mph in tour and just popped up. Pulled over, turned car on and off and it went away. No issues today, just passed the 500 mile mark, halfway to 1k. Can’t wait to switch it over to sport/track
Forgive me for asking … twice I’ve accidentally set max speed when intending to set cruise control. I thought the car might have gone into limp mode until realizing what I did.
Are you sure it was in limp mode?
Are you sure it was in limp mode?
Yeah CEL on and message showing reduced accel, I drive up and down the cajon pass in socal, heading back down the hill I won’t use cruise control, just tap the throttle while in 6th to keep me at flow of traffic but good portions just let the car coast down in gear and it’ll stay between 75-80 mph, light/warning came on, placed car in neutral to exit was just a 1/2 mile ahead. Just figured “lotus”. Showed my wife a photo of “her first CEL” like it was my kid learning to crawl or walk, she wasn’t amused
Not true, I just picked up my 25 Emira V6 manual last week. My car has maybe 600 miles so far, been driving a lot to break it in properly keeping it under 4k rpm for the first 1k miles and my car has gone into limp mode twice. Once this past weekend in 90F weather in traffic, got home turned off and hours later when I went to drive it was back to normal. Now last night on 5/13/26. I'm driving on the highway it's 10pm, 60F & no traffic at all. Eventually come to a light at parkway and car goes into limp mode (engine acceleration reduced & ESC service required) and my temp was 190F-194F when light comes on. I get home, turn off car and wait a minute. Turn it back on and it's back to normal. My car is completely stock.
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Happens often to me also. Once the cel stayed on after turning car off/on and scared me a bit. Had to clear it with my code reader, but hasn’t come back since. Car feels fine other than reduced redline, prob just electrical gremlins. I’m on a personal record of almost a month without this happening.
Limp mode has happened to me on hot days with long drives and track days since I took delivery a year ago.
Apparently my stock valve controller melted and the dealer replaced during my one year service.
Though that doesn't explain on/off recovering if it was fully damaged to begin with...
I won't be at the track or have long drives for a long while so can't really validate the controller fix...
Still think it's just overheating due to sub-optimal design despite coolant temps not alerting.
Or perhaps for others it's bad temp reading/signal? Who knows...
Apparently my stock valve controller melted and the dealer replaced during my one year service.
Though that doesn't explain on/off recovering if it was fully damaged to begin with...
I won't be at the track or have long drives for a long while so can't really validate the controller fix...
Still think it's just overheating due to sub-optimal design despite coolant temps not alerting.
Or perhaps for others it's bad temp reading/signal? Who knows...
Honestly, this is really a recall issue where lotus needs to add the cooling kit they have added to the newer models because they know the cars have heat issues .
First limp mode last year where I had to relocate my valve controller. Now gear box and limo mode issues.
But they won’t step up because it takes many hours to install the cooling kit similar to JUBUs.
First limp mode last year where I had to relocate my valve controller. Now gear box and limo mode issues.
But they won’t step up because it takes many hours to install the cooling kit similar to JUBUs.
First time it happened to my 2026 was around 600 miles, after coming to a stop after exiting the freeway. Has happened a few times since then, always in the exact same geographical spot. Hasn't happened anywhere else. Restarting the car makes it "go away", but if I check with a code reader, it shows as a pending code. P0111
It's annoying me that a new car has this issue so I'm taking it back to the dealer to get it documented and get their thoughts.
It's annoying me that a new car has this issue so I'm taking it back to the dealer to get it documented and get their thoughts.
Agreed, I already let my dealer know the issues I've been having. I told them I'll bring it in for my break in service at 1k. Since I'm already at almost 700miles. That way they can change the oil and check for any possible issues.
Keep us updated. I just got a 2026
I got the ESC/reduced acceleration error for the 2nd time. The first was Nov 2024 at 2200 miles. Got again Saturday at 6200 miles in the exact same spot as before.
I was going down interstate (after about 15 mins normal driving) on cruise at 75mph. Canceled cruise to take exit and ramp is a downhill exit so just coasted to a stop. Soon as got stopped at red light the ESC message popped up exactly like last time. Super weird. Gone that way lots of times in car and hasnt happened except those two times (only times), exact same conditions.
Pulled off after 1 mile in parking lot, turned car off, opened door then restarted. Back to normal.
Weird but seems to be a gremlin and rare so far.
I was going down interstate (after about 15 mins normal driving) on cruise at 75mph. Canceled cruise to take exit and ramp is a downhill exit so just coasted to a stop. Soon as got stopped at red light the ESC message popped up exactly like last time. Super weird. Gone that way lots of times in car and hasnt happened except those two times (only times), exact same conditions.
Pulled off after 1 mile in parking lot, turned car off, opened door then restarted. Back to normal.
Weird but seems to be a gremlin and rare so far.
Exact same failure mode as me. Off ramp is downhill, coast to the end, and that’s when it pops up. Happening a lot more lately.
This time, the code is permanent and won’t go away (I haven’t cleared it).
Have an appointment with dealer Wednesday.
No its only happened those two times and CEL went off after I quickly pulled over and restarted car. I've been that same stretch a lot since and never happened again.
Mine was coming to a light after getting off a long intestate downhill ramp and coasting to a red light. It came on as soon as I came to a complete stop.
Since it happened on road and cleared immed after restart i was never able to read the code. I think mine was related to the ESC though as seems like i got an error msg related to that displayed at the same time.
Gotcha. Glad it hasn’t come back for you, hopefully it stays that way. I get lots of error messages when it happens including an ESC disabled message and a collision avoidance disabled message.
Yes mine happens when I get to the bottom of an off ramp or bottom of a hill, or sometimes midway down a hill if I am coasting in neutral or with clutch depressed.
If its doing it routinely and throwing the code, you could try to do live-logging your MAF data if you have a code reader that can do that.
Or ask the dealer to go out and do that. Its probably in the wiring rather than the MAF/IAF integrated sensor though. Intermittent stuff is tough to analyze. Hoping my stays off as well. When i did get it the car seemed to run fine while it was on.
Definitely, great suggestion. I'd love to graph calculated intake air volume superimposed with intake air temp, requested load, etc. The dealer has done an extended road test for a day or so, *after* replacing the MAF, although I don't think they simulated the conditions where the issue happens. I also don't know if they were actively looking at data or just driving it around.
I will definitely be getting EmiraDS once I'm out of warranty. Other than that I am unaware of an OBD reader that can get juicy info from our cars. Even my friend's $4000 Autel MaxiSys Ultra doesn't have Lotus as an option. Doing a VIN auto scan it thinks it's a "Youngman" (Chinese company with some collab with Lotus) but will throw an error when trying to connect.
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At the risk of sounding stupid, I would like to share my experience with this problem. I had the same exact problems described above. CEL, limp-home mode, on and off symptoms for no apparent reason. I took the car to the dealer. They could not find anything wrong. 2025 V6 manual, stock.
I don't have the problem anymore. The culprit? Bad gas. I noticed that every time I gas up at this gas station, symptoms would show up. Since I've avoided this gas station, no more problem. I was probably getting regular gas instead of premium from this gas station.
Ok guys. Be easy on me on your comments. My solution sounds idiotic but it worked for me.
I don't have the problem anymore. The culprit? Bad gas. I noticed that every time I gas up at this gas station, symptoms would show up. Since I've avoided this gas station, no more problem. I was probably getting regular gas instead of premium from this gas station.
Ok guys. Be easy on me on your comments. My solution sounds idiotic but it worked for me.
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