OK I have a 2007 LTZ with LC9 5.3L engine - 198K miles. Engine seems to run very nicely and smooth with no abnormal sounds.
So I got the dreaded P0521 oil pressure sensor code. But the sensor appears to be working meaning that it does not go to 0 or 80, when the engine is running. I have replaced the sensor and no change. The code returns.
I recently did the 4-cyl DOD delete and when I installed the new aluminum cover for the top of the block. I know I did not install the small sensor filter, that goes under the sensor. Did not even know there was a sensor there until now. So I can confidently say that small filter is not clogged. And I am pretty sure there was not one pre-installed in the aluminum cover. And just for giggles, I stuck an angled pick down the hole, and the pick goes pretty darn deep. So no filter found.
Oil pressure does seem a bit lower that it has been in years past. But still seems to be showing 10PSI per 100RPM. Maybe a bit less at higher RPM. So does this sound like simple low oil pressure causing the P0521? I cant see how the missing filter would cause it. But I am going to install a new one right away.
I am currently running standard 5W30 oil in the engine. Do I need to start using a different oil? Maybe a thicker oil?
Thanks for the response. And praying this is not a sign of a dying motor.
So I got the dreaded P0521 oil pressure sensor code. But the sensor appears to be working meaning that it does not go to 0 or 80, when the engine is running. I have replaced the sensor and no change. The code returns.
I recently did the 4-cyl DOD delete and when I installed the new aluminum cover for the top of the block. I know I did not install the small sensor filter, that goes under the sensor. Did not even know there was a sensor there until now. So I can confidently say that small filter is not clogged. And I am pretty sure there was not one pre-installed in the aluminum cover. And just for giggles, I stuck an angled pick down the hole, and the pick goes pretty darn deep. So no filter found.
Oil pressure does seem a bit lower that it has been in years past. But still seems to be showing 10PSI per 100RPM. Maybe a bit less at higher RPM. So does this sound like simple low oil pressure causing the P0521? I cant see how the missing filter would cause it. But I am going to install a new one right away.
I am currently running standard 5W30 oil in the engine. Do I need to start using a different oil? Maybe a thicker oil?
Thanks for the response. And praying this is not a sign of a dying motor.