I’m pretty sure that’s the code my buddy’s truck threw sometimes after he changed the crazy upside down water separator on It. Does it run like it’s aired up? Might go away after you run it under load a while.
We bought the sensor from peterbilt but haven’t put sensor on yet. I guess we hang onto sensors for when the check engine light comes back on. Who knows what’s going on. Good grief. I’m not complaining although it may sound as so. Rather it be nothing then something. Lol
Something I had to learn about on these sensors. It the sensor detects the problem. But the problem could be anywhere on that line, wire or hose up un'till the sensor.
Never just assume it's the sensor and never assume a new sensor will work right.