2003 Cadillac CTS oxygen sensors

Tiny
RANYRIZK
  • MEMBER
  • 2003 CADILLAC CTS
  • 3.2L
  • V6
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
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.
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Tuesday, February 4th, 2014 AT 12:44 AM

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Tiny
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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.
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Tuesday, February 4th, 2014 AT 5:38 AM

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