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2003 Cadillac CTS Oxygen Sensor

Tiny
HODDYBURCH
  • MEMBER
  • 2003 CADILLAC CTS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 81,000 MILES
I just replaced the O2 sensor in my Cadillac with a brand new one. I am still getting the error codes P0161, and P0160. I can clear the codes but they come back on after about 25 miles of driving. If it has a new sensor why is the light still coming back on? How can I fix this?
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Wednesday, August 5th, 2009 AT 5:45 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

this is a no signal fault code, you may have a problem in the wiring so I would start with a continuity check of the wiring back to the ecu, and if that is ok, have the ECU tested as well.

Mark (mhpautos)
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Wednesday, August 5th, 2009 AT 5:50 PM

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