2003 Cadillac CTS oxygen sensors

2003 CADILLAC CTS
140,000 MILES • 3.2L • V6 • 2WD • AUTOMATIC
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RANYRIZK
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Dear
Could you clear me what is the difference between these 2 oxygen sensors and which one do I have to choose for my CTS?
AC Delco 213-1515
AC Delco 213-1516
Best regards.
Feb 3, 2014 at 4:44 PM
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KNOWLEDGE IS POWER
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One is probably upstream and the other is probably downstream. You have to determine which you need through reading the code Bank One sensor one is upstream and a Bank One sensor two is downstream.
Feb 3, 2014 at 9:38 PM
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