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Old 11-16-2012, 04:19 PM
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tturedraider tturedraider is offline
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Mein Auto: '06 Sonora/Beige 330i :-)
Quote:
Originally Posted by jburke4689 View Post
The thermostat is electronic. When it shorts I believe it fails to wide open so that you don't overheat. It will cause long warm ups and excessive emissions. That is why you have the SES light on.
Bingo - correct answer. Most people aren't aware of this, but the SES/CEL is always emissions related. The failure of the engine to reach optimum operating temperature adversely affects emissions.
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