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31/12/2023 2:10 pm
Topic starter
Hello,
I have a 2014 Suburban with a PO521 code, regarding the engine oil pressure sensor. I replaced that and the screen with factory parts and as a result, the engine comes back with that code. Any thoughts as to why the new switch isn’t working properly?
thanks
2 Answers
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31/12/2023 2:31 pm
Check your oil pressure with a mechanical gauge.
https://www.obd-codes.com/p0521
https://www.carparts.com/blog/p0521-code-engine-oil-pressure-sensor-switch-range-performance/
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01/01/2024 5:12 pm
Topic starter
Thank you for the links. I’ll have to get my hands on a mechanical gauge to test. The weird part is that the oil gauge shows pressure, but it’s primarily staying at 20psi. It never really passes 40psi. So at the very least it’s not giving a 0psi reading, but I’ll have to do some more diagnosing.