XC90 2.5t oil pressure sender location?

tbrd · Post by **tbrd** » 11 May 2017, 15:20

Hello all,

I've been pulling my hair out trying to find where the oil pressure sender is located on a 2006 XC90 2.5t. I have the much loved "no oil pressure" light and want to check the pressure with a real gauge. Pan seals have all been recently replaced. Any insight would be greatly appreciated!

Thank you in advance!
Mike

Post by **cn90** » 11 May 2017, 19:52

I think the location for Oil Pressure Sensor is the same for Volvo 850, S70, XC90 2.5T engines.
Why do you need to replace it?
The O-ring in the oil pan may be damaged.
Check oil level.
Maybe the passage is clogged?

Once the OPS is out, hook up a pressure gauge and start engine, take the readings at different rpm's and compare with specs.

: 2.5T-OPS.jpg (122.08 KiB) Viewed 13197 times

tbrd · Post by **tbrd** » 12 May 2017, 11:09

Thank you! Just the picture I needed!

Ordered a gauge, but hasn't come in yet. So I went ahead and replaced the oil pressure sender..and for several start ups and for 4 miles of driving, no oil pressure light, then wham! Intermittent "no oil pressure light"!

I just replaced the seals in the oil pan again (and they were still good... only about 40,000 miles since they were last replaced). No sludge, pickup tube was clean too. Also replaced the oil cooler since I was there.

Any thoughts on what to check next (beyond putting a pressure gauge on)?

Thanks again!

tbrd · Post by **tbrd** » 13 May 2017, 10:35

Ok... narrowed the problem down to when the engine is hot and below 700rpm or so the light comes on...rev the engine just a little and the light goes out. It's a band aid approach, but any thoughts on moving up to a heavier weight oil or bumping the timing a little? I can't find any leaks at this point

.

Thanks again!

tbrd · Post by **tbrd** » 13 May 2017, 10:36

Sorry for the ridiculously large emoji!

SEZA11 · Post by **SEZA11** » 07 Mar 2025, 16:47

Did you find the problem?

Post by **Krons** » 08 Mar 2025, 17:36

SEZA11 wrote: ↑07 Mar 2025, 16:47 Did you find the problem?

tbrd had not been on the forum since 2017.

When my 02 S60 2.4t had low oil pressure the oil on the dipstick showed bubbles indicating the oil pickup was sucking air and needed new o-rings. Indeed they were hard and crusty. While there I did put in a new oil pressure sensor for good measure. It can be reached from the bottom, located on front of block as indicated above in the thread.

Low oil pressure could also be the oil pump.