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Closed Fuel Loop - O2 sensor fault - 850 T5

uid 16216's pic
posted by  NBZ on  Wed Sep 14 01:49 CST 2005
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last visit: Thu Feb 2 21:31 CST 2012
[RELATED]

Yesterday, the lambda sond warning light came on.
Last night I ran a diagnostic on the car and while I didn't come up with any fault codes, the ScanTool software did indicate "Closed Fuel Loop - O2 sensor fault." Has anyone had any experience with this diagnostic message and if so, what was the remedy? I did reset the chip which did turn off the lambda warning light but am curious if this is just an O2 sensor going south, or if it may indicate a greater or impending problem.
Thanks,
Armie

--
'94 850 154000kms '86 760GLE 272000kms 95 Silverado4x4






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