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Escalade
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Discussion Starter #1
Today I did an oil change. I installed a new oil filter and 6 qts of full synthetic 5w-30 like I have read on here to do, plus prolong additive. Before the oil change every thing worked fine now my oil pressure is pegged at 80 PSI. Ive read on here that it could be the oil pressure sensor, but not sure. When I turn on the key it shoots to 80 PSI, when I turn off the key it goes to 0 PSI. As I drive it stays at 80. It literally worked right before the oil change. Now Im freaking out a little.
Also there are no leaks and no weird sounds or ticking(yet)...No other messages on the dash, and I reset the oil life to 100%.
Checked the dip stick and the oil is full.

If it is the sensor, can someone give me a pic of what to change? Will this cause any problems to drive like this.
 

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Discussion Starter #3
No messages showing. The only thing on the cluster thats different is the oil pressure. And like I said only happened after an oil change. It goes up when turned on, and down when turned off. Im trying to find the sensor on the engine, but I dont see it.
 

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2006 Escalade ESV
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180 Posts
Could it be the additive? 6 qts and then the additive might be producing the excess pressure? Does the dipstick read normal? I agree weird.
 

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08 Escalade ESV awd, 05 Yukon Xl Denali awd, 06 SRX sold
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Im leaning toward the sensor, its behind the intake manifold in the valley of the engine, basically the top rear center of the engine more toward the driver side, hope that makes since, easy diag is just unplug the sensor and check the gauge... Engine not running
 

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Discussion Starter #6
I found this picture so I was able to "locate" it. 2011-11-11_205218_1.gif But it was still hot even after sitting for awhile. I took the two plastic covers off and its so tight I can barely get my hand back there. Plus Im going to have to let it sit a lot longer before I would be able to touch it. I burned the crap out of my arm on this part. 2011-11-11_205218_1.gif




My level is at the top mark but still within tolerances. Is there any thoughts that this could damage the engine AT ALL??? Since its just the sensor Im guessing that it should be ok. Thank you for the responses, ANY more ideas would be greatly appreciated.


WHY would it go out during a oil change????
 

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03 cadillac escalade
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11,902 Posts
lowco8 said:
I found this picture so I was able to "locate" it.<img src="http://www.cadillacforums.com/forums/attachment.php?attachmentid=280698"/> But it was still hot even after sitting for awhile. I took the two plastic covers off and its so tight I can barely get my hand back there. Plus Im going to have to let it sit a lot longer before I would be able to touch it. I burned the crap out of my arm on this part.<img src="http://www.cadillacforums.com/forums/attachment.php?attachmentid=280706"/>
Ouch that part you burned your arm on is the fuel rail for the fuel injection
Easy way of checking the engine temp is with the engine temp gauge on the truck itself once it gets to the far left with the key on(2 hours roughly depending on ambient temp)

It is a tight fit but if you can unhook it then it will help with testing

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Huddy said:
Could it be the additive? 6 qts and then the additive might be producing the excess pressure? Does the dipstick read normal? I agree weird.
The additive would have nothing to do with it
 

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Discussion Starter #8
Can someone tell me the part number that works for the oil pressure sensor for the 2005 6.0? I checked all over and anytime I get a number that is supposed to be correct some websites say it is not compatible. The different ones I thought worked but then told it not compatible are, PS308, D1846A, S4202. Amazon says all these are compatible and also not compatible. Thanks for any info
 

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Just thought I'd share some information about your problem. The 2006 ESV Platinum I'm wanting to buy had the exact same issue. Dealer replaced oil, and during the test drive the Oil pressure was surge to 80, plummet to 0 when accelerating, and then climb back to 80 and hold for a minute. It was erratic. Took it back to the dealer and they replaced the "oil sending unit" (believe that's the pressure sensor?) and it fixed the problem.
 

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2005 Escalade
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The pressure sending unit is the one pictured in post 6. As hard as it is to reach that sensor, it's easy to replace, just remove the connector, screw the old one out, new one in. I have a part NIB out in my shop. I'll look up the number tomorrow and post up if you still need it.

This is the easier of the oil pressure problems to fix. I had the pressure drop to zero, and all the warnings go haywire after replacing a broken/rusted dipstick tube on my H2. Turns out a shred of metal worked it's way into the oil pump pressure relief valve. That was a nightmare to fix.
 

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Discussion Starter #13
Thank you everyone for the information. I have not received any of these posts in my email so I just saw it. Guerrilla, I just bought that part number so thanks a lot.
 
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