What is your question?
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What is your question?
I got a p0138 code. When I check the datastream on my scan tool it shows the downstream o2 sensor stuck at 1.27 volts. Than after a few minutes it switches quickly from 1 volt to 1.27 volts, sometimes getting stuck at 1.27 volts again. Eventually it drops below 1 volt, but switches quickly in a certain range, for example .80 and .84 volts. It doesn't follow the upstream sensor at all. Thank you
How long has your 2007 Dodge Ram 1500 had this problem?
2 weeks

It doesn't follow the upstream o2 st all. It just acts erratically. Mostly getting stuck at 1.27 volts.