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My '02 does this as well. Normally pressure guage starts at 4-5 bar idle - after warm up is around 2 -3
(mobil 1 0W40)
Once is a while the guage dies to zero - warning message comes on and then after 30 secs or so it jumps back to 5+
Car is running fiine
PO reported that to dealer - but they couldn't reproduce at the time - so nothing done
I tried cleaning sender terminals - still have same issue (intermitently)
The sender is a $70 part and about 1 hr labor to change- so I will do that soon
There are a couple of people here that did DIY - but looks kind of hard to get in there to replace (you need to rig up special tool - or get it on a lift and go in from bottom after removing wheel and heat shield - I think)
In Renntech TSB 1716 was "Blue Smoke from the Engine During High Transverse Acceleration"
Interesting read as I've experienced that problem too... scrolled through the TSBs and couldn't find anything on the Oil Pressure Sender.
For some reason I had oil level mixed up with oil pressure. The title of the thread threw me off. Anyways, the TSB is pertinent for the 2002 model as the OP has.
On a different note the oil level sender is also a major pain to get at with the engine in. The psngr intake manifold must come off, possibly the A/C. And probably drop the engine a little bit to gain access to the long multi function sensor.
...There are a couple of people here that did DIY - but looks kind of hard to get in there to replace (you need to rig up special tool - or get it on a lift and go in from bottom after removing wheel and heat shield - I think)
It sits on top the 4-6 cam cover.
You can use a crows foot on a long extension and get at it from the bottom.
With the psngr muffler and wheel out it might be accessible with a stub wrench and a small hand.
From the top you would have to remove the psngr intake manifold, and probably including the A/C, which is a major PITA.
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