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      02-23-2013, 02:32 PM   #9
VTECaddict
Where'd my VTEC go?
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Drives: 06 330i 6MT
Join Date: Mar 2009
Location: Seattle, WA

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The sensor works by wearing out fine wires to increase resistance. More resistance means its more worn.

The car expects minimal resistance (new sensor) when you reset it. If it detects a worn sensor when you reset, it will throw out the red service warnings.
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