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A P0520 error code on a 2004 Chevy Impala indicates a problem with the engine oil pressure sensor or its circuit. This code typically signifies that the engine control module (ECM) is not receiving a valid signal from the oil pressure sensor, which can lead to incorrect oil pressure readings. Possible causes include a faulty sensor, wiring issues, or oil pressure problems. It's important to diagnose and address this issue promptly to avoid potential engine damage.

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1mo ago

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