![]() What does it mean when your oil gauge is on 0? Some common causes behind the P0521 code are: An open or shorted wiring in the oil pressure sending unit circuit. If the low oil warning light activates along with the check engine light, stop driving immediately and have your vehicle towed for repairs. In some cases, the low oil warning light will illuminate. The P0521 engine code may point to a faulty oil pressure sensor, but it can also indicate insufficient oil pressure. If the problem persists, consider replacing the oil pressure sensor. Check voltage of oil pressure sensor to ensure it is within specified range. Visually inspect the wiring around the oil pressure sensor for disconnection. Verify the oil filter and drain plug are secure with no leakage. Cold weather can also make the oil pressure read low until the oil pump has had a chance to deliver the oil to the engine. Oil pressure gauge reading too low, generally below 15 to 20 PSI while idling. Oil pressure gauge not working: The causes for this range from a faulty gauge to the need for an oil change. What causes oil pressure gauge to not work? ![]() When Error Code P0521 is triggered, that means the PCM has determined an unexpected value in engine oil pressure sender/sensor, which is out of its normal range or could be fixed when it should fluctuate. Sometimes, however, there is no gauge rather, there will be a warning light to notify the driver about the problem. ![]()
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