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2004 V6 Oil pressure warning only on rough ground

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oil pressure warning indicator
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mountainreg2

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Discussion starter · #1 ·
My 2004 V6 is showing an oil pressure warning only when I drive over rough ground.

Just changed oil, hoping to see an end of the warning, alas it was back as I encountered the savage potholes (more like moguls) in a driveway.

Any possible suggestions?

PS the warning to stop the vehicle flashes only for a moment, blink and you miss it, but the oil can stays for a little longer, them goes.

Thanks.
 
#2 ·
Check your wiring and connectors....especially the pins in the connector. Sounds like something is loose.

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#6 ·
But oil pressure can be tricky. I've had a real oil pressure on my other car (Audi) and it was the PCV gone bad.
The stop warning engine came on when I decelerate. Here is how you test it: get on a road in good condition, go over to 80-90 km/h then apply the brakes. You don't need to apply the brakes like an emergency stop, just going from 90 to 40 for example. I was able to reproduce my issue this way and it ended up being the PCV.
For the V6 3.2 Treg the pcv 022103765A => 110€. You can buy a knockoff to test. It's easy to replace.
It might not be your issue but it would be worth investigating in case the sender/wiring solution does not yield good results.

https://fr.aliexpress.com/item/PCV-...87e4db411410-0&algo_pvid=cf445779-222f-431c-ac87-87e4db411410&priceBeautifyAB=0
 
Discussion starter · #7 ·
Thank you for the great responses.

I have had a chance to wiggle most connectors. Still getting error.

But I have noticed a new issue and an observation.

The warning light seems to come on when I head downhill, maybe not always bumpy road, and this sounds more like ?? (oil pickup? PCV?) I have not been able to replicate the error when doing 90-40 klms but there is a sense that it's more likely to occur when you take your foot off the accelerator (ie when the car starts down a hill)

The new issue had occurred before but was only once or twice, this was the car when in "P" with the engine running starts to rev up to around 1500 RPM then down again, the back up to 1500...

Paul
 
#9 ·
If it is a 3.2 the replacement is easy. If it is a 3.6 then you will need to remove the valve. And it is cheaper for the 3.6 since you will need to replace the rubber diaphragm only.


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#17 ·
Now on to understading how it really works as I'm having an issue with the intake after a valve cover gasket replacement. The pcv is breathing out of the relief nipple and making a bizarre sound.


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Discussion starter · #20 ·
Thanks, TRespect Really great, looks like I'm a 3.2, that was the only one sold in Australia, it looks like diaphragm should fit?

(I seemed to have posted this to the wrong thread.)

In the meantime, yes, PCV diaphragm has a tear, but I'd say I'm up for the whole unit as the plastic was very brittle and one of the lugs broke and the host snapped. Or I'm really clumsy.

Paul
 
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