P0420 and P0430 upstream sensors no voltage
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davidisurf
- Posts: 4
- Joined: 08 Apr 2017, 14:34
- Year and Model: Volvo XC90 2008 3.2
- Location: Lakeville MA
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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