Replaced oil pressure sensor . still getting same code P0521.... What should I do next?

Asked by Aug 30, 2015 at 02:39 PM about the 2008 Chevrolet Suburban

Question type: Maintenance & Repair

5 Answers

2,155

here you go take it to a dealer and http://engine- codes.com/uploads/gmc/11-03-07-144538.pdf give them that they have to fix it no charge

2 of 2 people found this helpful.
2,155

its a Chevrolet Factory Service Bulletin OBDII Code P0521

3 of 3 people found this helpful.

Ok. So what does this mean? Do I need to print this? I've talked to the dealership about the issue and they never mentioned anything ....will I run into any problems taking it there?

67,445

Looks like there's a secondary "valve lifter oil filter" in these engines. If it becomes clogged you can experience low oil pressure and trouble code P0521. This trouble code can also be a result of faulty wiring going to the oil pressure sensor. I agree that it's best, on this, to take it to the dealer with the TSB (Technical Service Bulletin, document number 2435251) in hand. You're out of warranty on this so it won't be a free fix. But I seriously doubt that a garage or gas station type of repair facility will be able to fix this. HTH. -Jim

1 of 1 people found this helpful.

I had the sensor and filter replaced on my 2007 Yukon and I still kept getting the PO521 code. The PCM is looking for a certain oil pressure range and if it doesn't see it, it will set the code. I only had 2500 miles on my oil when I started seeing this and got the sensor and filter replaced. what made it go away was to change the oil. I also noticed that with the older oil the AFM did not function. Fresh oil happy motor.

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