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Hi Roger I was n fact expecting Dynon to say just that. Three gauges all going out at once suggests a wiring rather than a sensor problem. In the meantime I'll have a look where you suggest, thanks. John

What about the two erratic CHTs? It appears they are a further symptom of the same problem. Is it possible that this faulty Oil Pressure sensor can cause other temp sensors to go haywire? I don't suppose the cost of replacing the sensor is a big deal, but am I to replace the CHTs also?

D180 in 2007 CTSW bought secondhand w/c65hrs Hobbs in Jan 2009, instrument functioning fine all the time AFAIK.  Now there’s approx 290hrs on Hobbs. Occasionally I noticed a few wild CHT excursions, at maybe 175 on the Hobbs; subsequent tightening of the spade connector made a useful...

photo links dont work. I have a related problem but I think I will start a new thread.

Are there standard Temperature parameter values for 912 ULS?  I bought my plane with 64 TTSN, and wonder if the D180 values are set correctly.  The CHTs are always on the low side; I taped over the rad, which made a useful improvement. But I still get low CHT warnings, which happened so...