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P0420 and P0430 upstream sensors no voltage

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
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Posts: 4
Joined: Sat Apr 08, 2017 2:34 pm
Year and Model: Volvo XC90 2008 3.2
Location: Lakeville MA

P0420 and P0430 upstream sensors no voltage

Post by davidisurf »

My 08 XC90 3.2 has check engine light on with codes P0420 and P0430. I'm trying to read live data on my obd2 scanner but I only have data from the downstream O2 sensors nothing from the upstream on both banks. So maybe I have faulty O2 sensors? Could be a wiring issue? Fuse or relay? If the sensors are bad, should I have other codes Any ideas?
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