BMW: Map Cooling Activation - Fault Code Help : BMW 5 series Forum • BMWLand

  BMW Forum: Car help, questions, answers, BMW discussion forum  
BMW Forum for UK BMW Car owners : Where Power Meets Control

BMW Forum: BMWLand Forum Portal Entrance BMW Forum: BMWLand - Forums for UK BMW Owners BMW Discounts & Support for BMWLand members BMW Forum Twitter, RSS, Facebook for BMWLand members BMW Car Insurance Discount BMWLand: Contact Us BMW Paint Repair discounts for BMWLand members BMW Oil Discount for BMW Engines BMW Car Tyre Discounts for BMWLand Members BMW Car Parts: Genuine BMW Parts Discount for BMWLand Members BMW ECU mapping BMW Swirl Flaps ©2015                           Contact: [email protected]

Peake BMW Diagnostics  
BMW Car Insurance Discount

Map Cooling Activation - Fault Code Help

BMW forum 5 series car: E12, E28, E34, E39, E60, E61, F07, F10, F11

Moderator: Moderators

Map Cooling Activation - Fault Code Help

Postby ruhul707 » Sat, 01 Aug 2009 20:14:36 UTC

Hi Guys,

since my last post I have had the rear bearings replaced at a cost of £250.00 for the MOT, garage also did a diagnostics test and came back with the following code: "123 Activation, map cooling"

Garage guy thinks that it is the engine temperature sensor, but wasn't sure, he told me to get a proper diagnostics done that checks live reading and all.

Firstly has this fault code been diagnoesd correctly, or should I get another diagnostic test, and secondly looking at eurocarparts there seem to be two types of temperature sensors for my car:


Had a look at realoem, I think I need part number 4, but which of the eurocarparts item is this.

How difficult a job is to replace this, I had a look under the bonnet and there looks to have been a water leak around the sensor at some time, but water levels are fine. The sensor itself is located under the vanos unit so does that mean the vanos needs to come out in order to change the sensor?


Posts: 36
Joined: Tue, 31 Jul 2007 23:24:19 UTC
Location: East London

Postby machinehead525 » Sun, 02 Aug 2009 11:24:06 UTC

isn't that code something to do with the thermostat?
Because life's too short not to............

Diamond Black '93 E34 525i Auto Saloon (sold)
Silver '99 E39 528i SE Auto Touring
Honda Fireblade for some real fun!!

User avatar

Posts: 2290
Joined: Wed, 23 Feb 2005 13:46:33 UTC
BMW Members Cars: E39 Auto Touring 1999 Leather (heated), HIDs, Auto Wipers, high OBC, Glass sunroof, Electric Memory Comfort Seats, etc
Location: Wiltshire UK
England (EN)

Postby Clavurion » Sun, 02 Aug 2009 18:03:40 UTC

Like machinehead already said this code is likely to be caused by faulty thermostat which has electric activation for higher temperature on partial load.
E39 530dA
BMW Warlord

Posts: 1930
Joined: Fri, 23 Feb 2007 00:42:46 UTC
Location: Finland

  • Forum Topics on BMWLand that may be of intetest to you
    Last Forum post

Return to BMW 5 series Forum

BMWLand: Who is online

Users browsing this BMW forum: chubbm, Clavurion, Google Adsense [Bot], mosy, uncleruin and 69 guests