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C-70 front O2 sensor not found

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R
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LucMan
Posts: 7
Joined: 8 August 2010
Year and Model: C-70 2001, 99 S-70
Location: NY

C-70 front O2 sensor not found

Post by LucMan »

I have an issue with my 2001 C-70 HT coupe. The CEL came on and when I checked the code it came up as mixture to rich.
The front O2 sensor was not showing up ( NA) on the OBD software only the rear was shown.
So having close to 100K I replaced the front O2 sensor with an OEM bosch and reset the CEL.
The problem is that the front O2 sensor is still not showing up.
Any one have any ideas on what to look for?
thanks.
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FCPEURO
Posts: 3002
Joined: 17 June 2009
Year and Model: 2006 XC90 V8
Location: Milford, CT
Been thanked: 19 times

Post by FCPEURO »

Check the wiring to see if there is a short in it at all. Also, check the connector to see if the points are dirty. Something is keeping the signal from being read by the ECU.
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