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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 02-23-2015, 07:10 PM
Jiimcalaverne Jiimcalaverne is offline
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Location: Ft. lauderdale
Join Date: Feb 2015
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Mein Auto: 2003 540i
2003 540i help me with a couple of codes

Hello fellow BMW owmers...anyone help me with a couple of code reading...Map controlled thermostat jammed....Map controlled thermostat circuit/control

Car runs fine....normal temp...reset the codes but they still come up
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Old 02-24-2015, 01:04 PM
tim330i's Avatar
tim330i tim330i is online now
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Location: SF
Join Date: Dec 2001
Posts: 8,748
Mein Auto: Ti Silver 03 M3
Welcome to Bimmerfest. I've moved your question to the E39 5 series forum, you will get more help in here. Do you have the exact codes that got pulled?

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Old 02-24-2015, 01:17 PM
edjack edjack is online now
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Location: San Jose, CA
Join Date: May 2007
Posts: 11,307
Mein Auto: '97 540i 6 speed
Possible defective thermostat? Ya think?

The codes indicate that the controlling element in the 'stat is bad.

What is the operating temperature? Unlock the cluster to measure coolant temp via test 7. S/b 105+ deg C.

Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

Last edited by edjack; 02-24-2015 at 01:19 PM.
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