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Get a Ultragauge.
UltraGauge OBDII Scan tool & Information Center
Located in the top right corner of the Ultragauge is a icon that is shaped like a oval. If the oval is broken it's in "open loop". In "closed loop" it is whole.
Pictures of the Ultragauge in open and closed loop can be found here.
https://www.google.com/search?q=ultr...X5A2UQ_AUIBygC
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