Overheating warning after driving through standing water

[leobc20]

Hi all,

Hoping someone might be able to help, have exhausted searching elsewhere.

BMW 1 series, 2012, 1.6 twin turbo petrol, c.45k miles bought 2nd hand about 12 months ago, drives like a dream and never has any issues, usually.

However, in conditions when there is a lot of standing water around and heavy rain I get pinged with the yellow engine temp warning and then red engine temp warning almost immediately after having to traverse a relatively deep puddle (10/20cms or so)... as far as I can tell the engine isn't actually overheating, after 30 seconds or so the warnings drop back from red to yellow and then disappear. As soon as I hit the next bit of standing water, the same thing happens.

No issues at all in moderately wet or other contiditions i.e. drove from Hampshire to lake district and back a week ago with no issues, similar length drives regularly and locally with no issues either...

Must be something like water causing issues with a sensor or something similar, but completely stumped and want to try and avoid a costly trip to the garage where they find nothing wrong... any one had the same issues, or any ideas?

Thanks in advance!

[No one]

Hi.

See the manual, page 133, "Wading". Your depth estimation looks fine, just mind your speed, perhaps.

[leobc20]

Thanks v much for highlighting that... I'll go slow next time and see what happens... dry the last couple of days and no repeat of the issue... very odd.