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Identifying O2 Sensor Wires

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Old Aug 17, 2014 | 01:07 PM
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Default Identifying O2 Sensor Wires

Swapping some exhaust over between bikes right now. I paid to have the exhaust installed on my '13 FLHR last year. Judging by the placement of the wires on the two bikes I'm swapping, the O2 sensor wires appear to be reversed. Both bikes have 4-wire sensors, black/grey/white/purple. No markings on either sensor. Wondering if it's possible the tech accidentally swapped them last year by mistake. How do I identify the correct order?
 
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Old Aug 17, 2014 | 02:04 PM
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Black plug - rear cylinder
Grey plug - front cylinder
 
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Old Aug 17, 2014 | 02:12 PM
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Thanks. Awesome. They've been swapped backward for a year. Maybe that explains the 36mpg i've been getting.
 

Last edited by jayhawkclint; Aug 17, 2014 at 02:16 PM.
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Old Aug 17, 2014 | 02:58 PM
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Black is back
 
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