Engine temperature high-drive moderately issue

zionn · 03-25-2025, 08:32 AM

Hi all,

Looking for some peace of mind here. 19k miles on 23 6MT M2.

Driving home from the store yesterday, engine temp too high, drive moderately message pops up.

Drove the car home slowly (just a few miles), never hit the "engine overheating" message.

Coolant is full, oil temps were fine and oil levels are fine, but coolant temp went all the way to the edge of red (didn't go into red).

I'm assuming water pump issue, but really concerned if there is damage to the engine.

Should I be concerned?

ednir98 · 03-25-2025, 08:57 AM

I had something similar happen in an older bmw, it was a corroded grounding strap on the water pump. Even though it said I could keep driving I parked it and had it towed. Although your engine is most likely fine, continuing to drive at high temps is absolutely not worth the risk.

Bumpinjeep · 03-25-2025, 09:07 AM

Quote:

Originally Posted by zionn

Hi all,

Looking for some peace of mind here. 19k miles on 23 6MT M2.

Driving home from the store yesterday, engine temp too high, drive moderately message pops up.

Drove the car home slowly (just a few miles), never hit the "engine overheating" message.

Coolant is full, oil temps were fine and oil levels are fine, but coolant temp went all the way to the edge of red (didn't go into red).

I'm assuming water pump issue, but really concerned if there is damage to the engine.

Should I be concerned?

Tow it to the dealer. Definitely not worth risking the car. Check under the hood for steam or any coolant leaks.

M_Power Rob · 03-25-2025, 09:09 AM

Quote:

Originally Posted by zionn

Hi all,

Looking for some peace of mind here. 19k miles on 23 6MT M2.

Driving home from the store yesterday, engine temp too high, drive moderately message pops up.

Drove the car home slowly (just a few miles), never hit the "engine overheating" message.

Coolant is full, oil temps were fine and oil levels are fine, but coolant temp went all the way to the edge of red (didn't go into red).

I'm assuming water pump issue, but really concerned if there is damage to the engine.

Should I be concerned?

Did you take a picture of the warning? Could be a number if things. It's under warranty, call BMW (your dealership) and tell them to come pick it up and bring you a loaner. Dontbwant to mess around with temp issues.

zionn · 03-25-2025, 09:17 AM

Yep, dealer knows and car is being towed there tomorrow...just worried if the damage has already been done. Haven't seen this on the newer M2's yet, even trying to find similar on the X3M or M3/M4 boards, but nothing really comes up unfortunately.

M2M3M3 · 03-25-2025, 09:25 AM

Quote:

Originally Posted by zionn

Yep, dealer knows and car is being towed there tomorrow...just worried if the damage has already been done. Haven't seen this on the newer M2's yet, even trying to find similar on the X3M or M3/M4 boards, but nothing really comes up unfortunately.

highly doubtful there would be any damage. never hit the red or the overheating warning. it was just "too warm".

DomMuc · 03-25-2025, 09:37 AM

Quote:

Originally Posted by zionn

Hi all,

Looking for some peace of mind here. 19k miles on 23 6MT M2.

Driving home from the store yesterday, engine temp too high, drive moderately message pops up.

Drove the car home slowly (just a few miles), never hit the "engine overheating" message.

Coolant is full, oil temps were fine and oil levels are fine, but coolant temp went all the way to the edge of red (didn't go into red).

I'm assuming water pump issue, but really concerned if there is damage to the engine.

Should I be concerned?

did you check both coolant reservoirs?

zionn · 03-25-2025, 09:48 AM

Quote:

Originally Posted by DomMuc

did you check both coolant reservoirs?

I checked the left side of the engine reservoir...filled perfectly to max. Where is the other reservoir?

DomMuc · 03-25-2025, 09:52 AM

See pic

zionn · 03-25-2025, 02:11 PM

Quote:

Originally Posted by DomMuc

did you check both coolant reservoirs?

Checked the other, not at max, but not at min either, so one full to max, other above min.

zionn · 03-26-2025, 08:27 PM

Turns out it was the temperature sensor...resistance is too high, so reading is way off. CEL though was noting the coolant temperature was too low.

There is also a recall on the M2 DME software. They've not published it yet.

M_Power Rob · 03-26-2025, 08:56 PM

[QUOTE=zionn;31963423]Turns out it was the temperature sensor...resistance is too high, so reading is way off. CEL though was noting the coolant temperature was too low.

There is also a recall on the M2 DME software. They've not published it yet.[recall.

The DME software is not a recall.

zionn · 03-27-2025, 06:05 AM

[QUOTE=M_Power Rob;31963487]

Quote:

Originally Posted by zionn

Turns out it was the temperature sensor...resistance is too high, so reading is way off. CEL though was noting the coolant temperature was too low.

There is also a recall on the M2 DME software. They've not published it yet.[recall.

The DME software is not a recall.

Just saying what my advisor said

M2M3M3 · 03-27-2025, 06:49 AM

Quote:

Originally Posted by zionn

Just saying what my advisor said

Dealers call everything a recall.

Details about the SIB for the DME are in several threads here.

Glad the solution for your car was simple!

M_Power Rob · 03-27-2025, 10:03 AM

Quote:

Originally Posted by M2M3M3

Dealers call everything a recall.

Details about the SIB for the DME are in several threads here.

Glad the solution for your car was simple!

Exactly. I called my dealer out when they emailed, called and texted me about it. They had a manager respond to apologize and correct but when I played along and asked what does the update do...🦗🦗🦗

zionn · 03-27-2025, 10:12 AM

Either way...they originally said the DME update would fix the issue, but it didn't (found out 20 minutes down the road lol). Waiting now to hear if the temp sensor was the issue.

Haven't seen this issue on any boards for the S58 engine, so hoping this is useful to someone else in the future.

KC87ZB · 03-28-2025, 03:40 PM

Quote:

Originally Posted by M_Power Rob

...CEL though was noting the coolant temperature was too low.

Now that seems implausible. low coolant temp - any time not up to temp, I cannot imagine low would throw a CEL. But hey, who knows how BMW engineers thing

M_Power Rob · 03-28-2025, 06:47 PM

Quote:

Originally Posted by KC87ZB

Now that seems implausible. low coolant temp - any time not up to temp, I cannot imagine low would throw a CEL. But hey, who knows how BMW engineers thing

Not sure what you did but that is not my post you quoted...

zionn · 03-29-2025, 08:37 PM

Quote:

Originally Posted by KC87ZB

Now that seems implausible. low coolant temp - any time not up to temp, I cannot imagine low would throw a CEL. But hey, who knows how BMW engineers thing

LOL! Yep...it's definitely a thing

03-25-2025, 08:32 AM	#1
zionn Enlisted Member 27 Rep 31 Posts Drives: 2023 M2, 2021 X7 M50, 2017 X3 Join Date: Jul 2023 Location: Hagerstown, MD iTrader: (0)	Engine temperature high-drive moderately issue Hi all, Looking for some peace of mind here. 19k miles on 23 6MT M2. Driving home from the store yesterday, engine temp too high, drive moderately message pops up. Drove the car home slowly (just a few miles), never hit the "engine overheating" message. Coolant is full, oil temps were fine and oil levels are fine, but coolant temp went all the way to the edge of red (didn't go into red). I'm assuming water pump issue, but really concerned if there is damage to the engine. Should I be concerned?
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03-25-2025, 08:57 AM	#2
ednir98 Lieutenant 1391 Rep 545 Posts Drives: G87, F15 Join Date: Jun 2024 Location: TX iTrader: (0)	I had something similar happen in an older bmw, it was a corroded grounding strap on the water pump. Even though it said I could keep driving I parked it and had it towed. Although your engine is most likely fine, continuing to drive at high temps is absolutely not worth the risk. Last edited by ednir98; 03-25-2025 at 08:58 AM..
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03-25-2025, 09:17 AM	#5
zionn Enlisted Member 27 Rep 31 Posts Drives: 2023 M2, 2021 X7 M50, 2017 X3 Join Date: Jul 2023 Location: Hagerstown, MD iTrader: (0)	Yep, dealer knows and car is being towed there tomorrow...just worried if the damage has already been done. Haven't seen this on the newer M2's yet, even trying to find similar on the X3M or M3/M4 boards, but nothing really comes up unfortunately.
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03-25-2025, 09:52 AM	#9
DomMuc Lieutenant 743 Rep 593 Posts Drives: G87 M2 Join Date: Nov 2012 Location: Munich iTrader: (0)	See pic Attached Images
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03-26-2025, 08:27 PM	#11
zionn Enlisted Member 27 Rep 31 Posts Drives: 2023 M2, 2021 X7 M50, 2017 X3 Join Date: Jul 2023 Location: Hagerstown, MD iTrader: (0)	Turns out it was the temperature sensor...resistance is too high, so reading is way off. CEL though was noting the coolant temperature was too low. There is also a recall on the M2 DME software. They've not published it yet.
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03-26-2025, 08:56 PM	#12
M_Power Rob Brigadier General 5052 Rep 4,070 Posts Drives: '23 M240 and '23 M2 Join Date: Jan 2023 Location: South Florida iTrader: (0)	[QUOTE=zionn;31963423]Turns out it was the temperature sensor...resistance is too high, so reading is way off. CEL though was noting the coolant temperature was too low. There is also a recall on the M2 DME software. They've not published it yet.[recall. The DME software is not a recall.
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03-27-2025, 10:12 AM	#16
zionn Enlisted Member 27 Rep 31 Posts Drives: 2023 M2, 2021 X7 M50, 2017 X3 Join Date: Jul 2023 Location: Hagerstown, MD iTrader: (0)	Either way...they originally said the DME update would fix the issue, but it didn't (found out 20 minutes down the road lol). Waiting now to hear if the temp sensor was the issue. Haven't seen this issue on any boards for the S58 engine, so hoping this is useful to someone else in the future.
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