What causes a P0521 code?

Some common causes behind the P0521 code are: An open or shorted wiring in the oil pressure sending unit circuit. Mechanical engine failure. A faulty oil pressure.

What causes oil pressure sensor code?

The most common causes for a P0520 are: Faulty oil pressure sensor/switch. Faulty oil pressure from dirty engine oil. Faulty oil pressure from a lack of compression.

How do you fix no oil pressure?

Engine Problems The increased bearing clearance allows oil to flow faster, lowering pressure in the entire system. Similarly, wear in the oil pump might bleed off pressure before it gets into the system. One way to fix oil pressure in this case is to use a higher-viscosity oil, such as switching from 5W-20 to 10W-30.

What’s the po521 code on a 2007 Yukon?

5 people found this helpful. I had the sensor and filter replaced on my 2007 Yukon and I still kept getting the PO521 code. The PCM is looking for a certain oil pressure range and if it doesn’t see it, it will set the code.

What does the Diagnostic Code p0521 GMC mean?

P0521 GMC Meaning The Powertrain Control Module (PCM) continuously monitors the engine oil pressure. The Oil Pressure Sensor/Switch sends a signal to the PCM when the engine is running. The Diagnostic Trouble Code (DTC) P0521 is detected when the signal sent from the oil pressure sensor to PCM goes out of range.

What does the p0521 oil pressure sensor code mean?

The P0521 engine code may point to a faulty oil pressure sensor, but it can also indicate insufficient oil pressure. In some cases, the low oil warning light may illuminate. If the low oil warning light activates along with the check engine light, stop driving immediately and have your vehicle towed for repairs.

When does the ECM set the p0521 code?

The P0521 code is set when the ECM detects the voltage value is either higher or lower than the specified acceptable range of oil pressure. This code can also be set when the engine detects constant fluctuation of the oil pressure value.