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Saturn 2001 o2 sensor error despite replacement

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Jul 30, 2012, 10:44 AM

Post #1 of 2 (1704 views)
Saturn 2001 o2 sensor error despite replacement Sign In

I have a 2001 Saturn L300 I bought a couple months ago. I bought it with the check engine light on from o2 sensor and the dealer agreed to replace it (it took a good month or so before this happened, I don't know if that effected anything). Anyway as soon as the sensor was changed the light came back on and then started flashing at me when I accelerate onto the freeway, it didn't do that before. I went and got it scanned and got o2 sensor codes again, with additional EGR valve and cylinder misfire errors. We changed the spark plugs and reset the check engine light but it again came back on. I drove it around a bit and got it scanned again and now it's saying just o2 sensor codes p0056 and p0161. Before I got it scanned I was thinking the EGR valve might need cleaned or replaced, but now as that error is not coming up, nor the misfire, I'm a bit lost as to what to do. Both of those errors refer to circuit issues. Any ideas what to do next? Thanks so much!

Hammer Time
Ultimate Carjunky / Moderator
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Jul 30, 2012, 12:01 PM

Post #2 of 2 (1675 views)
Re: Saturn 2001 o2 sensor error despite replacement Sign In

Those are both heater codes for the Bank2 downsteam sensor and they aren't affecting your driveability in any way.


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