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Is anyone having trouble with this downpipe? I needed Cat on my 2013 S60 AWD R-Design so I went this route and replaced my O2 sensors at the same time. I made it 4,500 miles before my check engine light came back on with the P0420 code which could mean a bad cat or a Bank 1 O2 sensor or maybe something else. It has sense cycled back off and now back on again. I don't think it's a bad wire on the sensor but who knows. I also saw that IPD sells a couple of different versions of Oxygen Sensor spacers for high flow cats/downpipes. Would putting one of those potentially help if it is showing to be the sensor? Not sure what my issue is, but I wouldn't think the sensors are bad since they are new. They are Denso sensors but everything I've seen that Denso makes the electronics on these Volvo cars. I might end up having to go to a Volvo indy shop and have them hook it up to a Volvo computer. Is there any other way to tell looking at different diagnotics coming from a code reader? I've got a code reader that can graph various engine diagnostics. Also, I always do all the maintenance and even do all the recommended oil and gas treatments when they pop up to keep all the crap out of the engine, so I don't think my engine is killing the CAT. Any ideas anyone? Thanks
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