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      10-13-2012, 07:06 AM   #73
Lieutenant General

Drives: E90 & Z4 Coupe
Join Date: May 2012
Location: MARLAND

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Originally Posted by evssss1 View Post
Guys, I believe my car (05 E90 325i) might be running into the same issue.

I spot the 2E81 code.... cleared it and it showed up again after a trip.

Seems my pump is going. Weird enough though, the RPM did drop to 0 according to the record but I did not get any overheating warning (YELLOW or RED).

So I'm not sure if it is a sensor issue or the pump issue itself.

Having said that, according to OBD2 reading the coolant temperature is maintaining around 100-105 degC (not F) under daily drive. Is it normal?
The 2E81 code should indicate a slow pump speed deviation from the max pump speed of 250 RPM. It will not show a pump speed of zero. The car will not overheat in this condition. 2E82 is the code for a completley failed pump i.e. Zero RPM; where the car WILL overheat. Get the pump changed very soon, before it completely fails.