[krapster]

Hi All,

Car: 2008 E90 335i sedan

Background
About 10/2012 had an issue with water pump failure and had it towed to dealership. The warranty insurance replaced water pump but refused to replace the thermostat. Ever since the original water pump issue year ago, many different little things happening. I've attached a picture of the error codes

Some of the symptoms:
- really rough idle in random parts of the day and temp (jump to 2000 rpm and then 650 rpm then back to 2000rpm.

- The temp gauge in car takes about 1 hour to settle in the middle which is 250 degrees. Prior to the water pump failure it would take 15-20 minutes to reach 250 degrees.

- After turning off engine, it is really HOT. I leave the hood open and hours later it is still very hot from the outside. I cant touch hood of car because it is too hot.


Error code
I bought the Bavarian Technic Cable Diagnostic / Reset Tool for BMW and used to check for engine codes and these codes generated:

MSD80/MSd81 Engine Module for N53/N54

- 2EF7
2EF7 characteristic diagram thermostat, control
Error will not cause a warning light
Error is not currently present
Test conditions have been completed
timeout

- 2E83
2E83 Electrical cooling pump, low-power mode
Error will not cause a warning light
Error is not currently present
Test conditions have been completed
Short circuit or signal interruption

HELP as much as you can
- The dealer states that warranty will not replace the part because it has not failed.
- I would like to resolve this issue before I am stranded on a long cross country trip.
- Will replacing the water pump and thermostat the next likely step?


Best,

[kaleo]

Hi my friend,
Did you resolve the error 2ef7?
Thanks

[mweisdorfer]

Why they did not replace the thermostat while they were in there is beyond my comprehension. Hind site being 20/20 you should have paid them the extra$$ to replace the thermostat. My guess is now you have to replace the thermostat and the water pump. There is a great DIY at BavAuto. The parts can be had for under $450.00 if you shop around.

[PichaDis11]

Originally Posted by mweisdorfer

Why they did not replace the thermostat while they were in there is beyond my comprehension. Hind site being 20/20 you should have paid them the extra$$ to replace the thermostat. My guess is now you have to replace the thermostat and the water pump. There is a great DIY at BavAuto. The parts can be had for under $450.00 if you shop around.

My thoughts exactly.

Originally Posted by kaleo

Hi my friend,
Did you resolve the error 2ef7?
Thanks

This error points to a failed or failing thermostat. Replace and go!