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GlenC
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GlenC's post in 2008 Cayenne S oil monitoring failure was marked as the answer
Problem fixed!!! YEA!... Turned out to be the pressure sending unit... Once I reinstalled the working Durametric, I did a road test while monitoring Oil Temp, Oil Pressure and Oil Pressure sender voltages. All was normal until the oil temp rose above 80C then things started to happen. Very erratic pressures and voltages, and when RPM was near 1000, all pressure sending stopped at something around .360V and something under 600mbar..... thus the deduction of sending unit failure. Ordered the sending unit from the local Dealer (got a good price!!! :-) ) and about 3-hours of work I replaced it (not the easiest thing to get to).....however, no more errors!!!