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Oil pressure sensor location
Hi all, I have a 2006 Volvo S40 2.4i and when I turn on my car my the oil presure light comes on for a second or two and goes off. The engine seems like it wants to stall but I cant hear any knocking noise. Also when I drive it sometimes the light will come on for a fraction of a second and will go off. There is plenty of oil in the engine. I just changed it 2 weeks ago. I am thinking to start with the oil presure sensor since the part is only a few bucks. However I cant seem to find the location of the oil sensor... thanks for any advise. |
the oil pressure sensor should be on the front of the block in the center, a little above the oil pan seam. Not sure how much room there is for access from the top without removing the intake manifold so you may want to remove the lower valence and look from the bottom up.
The fact that your light goes on for a second or two when driving is a pause for concern. You don't say how many miles on the car but you need to consider other causes for low oil pressure - ie 1) debris or gunk in the pick up 2) oil pump or gasket issues 3) incorrect oil weight or filter type 4) sensor/wiring. You are correct that replacing the sensor is cheap enough (IPD sells an aftermarket one for $6, Genuine Volvo is about $30) but its not a common failure item. One other thought - If you have plans to do the PCV system any time soon, that's the perfect time to replace the sensor since you'd be removing the intake manifold to access the breather pipes. If the low oil pressue is gunk related, then this would be a logical maintenance approach - ie drop the oil pan and clean the bottom end, rework the oil pump gasket etc, refresh the PCV parts, clean out the block ports, refresh the sensor. This is the most likely steps to take should the sensor prove to be in good shape. |
Originally Posted by mt6127
(Post 468969)
the oil pressure sensor should be on the front of the block in the center, a little above the oil pan seam. Not sure how much room there is for access from the top without removing the intake manifold so you may want to remove the lower valence and look from the bottom up.
The fact that your light goes on for a second or two when driving is a pause for concern. You don't say how many miles on the car but you need to consider other causes for low oil pressure - ie 1) debris or gunk in the pick up 2) oil pump or gasket issues 3) incorrect oil weight or filter type 4) sensor/wiring. You are correct that replacing the sensor is cheap enough (IPD sells an aftermarket one for $6, Genuine Volvo is about $30) but its not a common failure item. One other thought - If you have plans to do the PCV system any time soon, that's the perfect time to replace the sensor since you'd be removing the intake manifold to access the breather pipes. If the low oil pressue is gunk related, then this would be a logical maintenance approach - ie drop the oil pan and clean the bottom end, rework the oil pump gasket etc, refresh the PCV parts, clean out the block ports, refresh the sensor. This is the most likely steps to take should the sensor prove to be in good shape. Thanks |
when you say engine flush, do you mean a coolant system flush or a Seafoam treatment in the oil? If you are thinking of dropping the oil pan to inspect for debris and doing the oil trap /PCV system, you can consider doing a Seafoam treatment first. If the engine is sludged then there's a lot more to talk about.
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Originally Posted by mt6127
(Post 469008)
when you say engine flush, do you mean a coolant system flush or a Seafoam treatment in the oil? If you are thinking of dropping the oil pan to inspect for debris and doing the oil trap /PCV system, you can consider doing a Seafoam treatment first. If the engine is sludged then there's a lot more to talk about.
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about 1 to 1.5 oz (a shot glass) per quart of oil is what the can says so I'd do 1 measuring cup of Seafoam in the oil fill about 200-300 miles before you change the oil.
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