2008 Grand Prix GXP LS4
I am getting the Service Engine Light often on my GP. The code is P0521--Oil Pressure Sensor Error. I've noticed this is a common problem for the LS4 engines in Pontiacs, Chevs, & Chev/GMC trucks.
Car has 160,000 miles on it. No abnormal engine noises--runs fine, uses about 1 qt. oil each 2000 miles, which is normal for these LS4 engines.
I've replaced the oil pressure sensor and screen below it. The problem still appears within a few days after resetting the trouble code.
Anyone have a likely solution for this problem? .
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