2003 Cadillac CTS Oxygen Sensor

2003 CADILLAC CTS
81,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
HODDYBURCH
  • MEMBER
  • 1 POST
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?
Aug 5, 2009 at 5:45 PM
Advertisement
Avatar
MHPAUTOS
  • CERTIFIED EXPERT
  • 31,937 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)
Aug 5, 2009 at 5:50 PM