Oil pressure sensor issue - P0521

[David hilker]

Hi I have a 2013 Chevy suburban with a 5.3L last year I got the oil pressure sensor changed because it went bad it’s been fine till today when I was driving I gotta check engine light when I scanned the code i got code PO521 mind you the oil pressure gauge didn’t change from what it was saying before the code popped up im currently stuck at the moment if anyone has dealt with this and could possibly know what could make the code pop up I’d greatly appreciate the input on how to fix it

Thank you in advance

 

[Miami-Dade]

@David hilker Moved you here from Site News.

Welcome from Queens NY&Miami!

 

[swathdiver]

Hi I have a 2013 Chevy suburban with a 5.3L last year I got the oil pressure sensor changed because it went bad it’s been fine till today when I was driving I gotta check engine light when I scanned the code i got code PO521 mind you the oil pressure gauge didn’t change from what it was saying before the code popped up im currently stuck at the moment if anyone has dealt with this and could possibly know what could make the code pop up I’d greatly appreciate the input on how to fix it

Thank you in advance

A bad sensor?

With the engine on and transmission in park, vary the engine speed by 500 rpm, verify with a scan tool that the engine oil pressure changes by more than 5 psi. It doesn't do that, you have to discover why the loss of actual oil pressure. If the pressure tests normal, replace the sensor.

GM OE sensors for the win, aftermarket sensors don't play nice with the computer system.

 

[Foggy]

Exactly what Swathdiver said !!!!

 

[Fless]

Here's the diagnostic path, if you wish to view it. But what @swathdiver said is what to do.

P0521 — 2013 Chevrolet Suburban 2WD V8-5.3L Service Manual | Operation CHARM

Detailed repair manual for the 2013 Chevrolet Suburban 2WD V8-5.3L.

charm.li

 

[Bronson357]

I had the same problem on 1000 mile trip to Chicago, would cut out and throw a light on occasionally, kicking out cruise and such. Put a new standard brand sensor and it works well.

 

[Cranker57]

Hi I have a 2013 Chevy suburban with a 5.3L last year I got the oil pressure sensor changed because it went bad it’s been fine till today when I was driving I gotta check engine light when I scanned the code i got code PO521 mind you the oil pressure gauge didn’t change from what it was saying before the code popped up im currently stuck at the moment if anyone has dealt with this and could possibly know what could make the code pop up I’d greatly appreciate the input on how to fix it

Thank you in advance

It might be the oil pump pick up tube seal