error code 91 & 41
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error code 91 & 41
The other day I was driving home from work and at ~2500 RPM the fuel seemed to cut off as if I had a rev limiter, but I don't. So I pulled codes and got 91 & 41, driver's side O2 sensor and passenger side O2 sensor, respectively. In the morning and lunch, it drove fine each time. The problem was Tuesday evening - and one thing to note is that it has been VERY cold here, I don't think we got above -5 on Wednesday and it was colder Thursday. I started the truck Thursday morning, outside temp was at -10, let the truck warm up to ~150 before I moved it and almost immediately I had the same issue with the fuel cutting off at 2500 RPM, so I parked it for now.
I can't imagine that extreme cold can do this to my o2 sensors, I mean, when I see all the other cars on the road at the same time my truck has problems it just doesn't make sense but that is all I can correlate the problem with for now.
Anyone experienced this type of behavior?
Also, a relay labeled as MA/02 seems to provide the sensors with power. Where is that relay located on my truck?
I can't imagine that extreme cold can do this to my o2 sensors, I mean, when I see all the other cars on the road at the same time my truck has problems it just doesn't make sense but that is all I can correlate the problem with for now.
Anyone experienced this type of behavior?
Also, a relay labeled as MA/02 seems to provide the sensors with power. Where is that relay located on my truck?
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
And or truck do more sitting now and with less than topped off fuel tank/s, more so now then did before?
Lean and very cold might be the dry gas they put in their tanks while might be enough to keep it from freezing up sold might not be enough to keep it from shushing up in your lines and causing lean mixture.
Simply condition related or yea might be a larger issue but that cold weather I'd try little dry gas first see if that corrects the problem.
If like my truck gas just isn't in it long enough to gain excessive moisture beyond what it might get from the underground tanks, if the station manager is doing what he/she should be treating the fuel? then no probably not the problem but worth a try regardless.
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