P0522 Code: Engine Oil Pressure Sensor/Switch Low Voltage

The proper working of the engine oil pressure sensor is very important for the efficient performance of the engine. It monitors the engine oil pressure and sends this data to the powertrain control module (PCM). When PCM observes an issue with the oil pressure sensor, it triggers a trouble code. When it detects that your oil pressure sensor reading is less than the predesigned reading, it triggers the P0522 code. This article mainly explains the P0522 code meaning, causes, and symptoms.

P0522 Code Definition

The P0522 code stands for “Engine Oil Pressure Sensor/Switch Low Voltage.”

What does the P0522 Code mean?

The P0522 code indicates that your powertrain control module (PCM) detects that the voltage signal coming from the oil pressure sensor/switch is less than the specified limit.

P0522 code

The PCM or ECM of your vehicle is used to control the vehicle sensors and other electronic parts. It also helps to ensure the optimum performance of the engine. Your PCM is connected to the engine oil pressure sensor.

The engine oil is used to lubricate the rotating parts of your car. The engine oil prevents the rotating parts from heating and ensures their smooth operation. Your vehicle oil must have sufficient pressure.

When the oil moves between the openings of the engine to lubricate them, pressure generates. This pressure assists the oil in reaching all engine corners and parts. The oil pressure is a force that forces the oil to flow from the oil pan to all the moving parts of the engine.

Modern cars contain an oil pressure sensor. This sensor monitors the oil pressure in the engine and transfers this information to the PCM/ECM. Your PCM uses this information to control the oil supply to the moving parts and to ensure the efficient working of the engine.

The pressure-sensing unit of the oil pressure sensor has direct contact with the oil gallery. Therefore, the resistance of the oil pressure sensor will decrease or increase as the oil pressure in the oil gallery changes.

When your PCM monitors that the signal coming from the engine oil pressure switch is less than a specific limit, it triggers the diagnostic trouble code (DTC) P0522 code.

Causes of the P0522 Code

  • A faulty engine oil pressure sensor
  • Faulty oil pressure switch
  • Not replacing the engine oil regularly
  • Faulty or clogged oil filters
  • Not using the best suitable viscosity oil
  • Damaged or open oil pressure sensor harness
  • Damaged wires to the engine oil pressure sensor
  • Bad instrument cluster
  • Insufficient oil level
  • Dirty oil
  • Blocked oil passages
  • Unnecessary mechanical wear in the engine and engine parts like the oil pressure relief valve and oil pump
  • Excessive resistance in the circuit

Symptoms of the P0522 Code

  • Illuminated check engine light
  • Difficult to start the vehicle
  • The engine oil pressure gauge reading is too low
  • Engine stalling issues while driving
  • Engine noises such as rumbling, knocking, thudding, or ticking
  • Engine misfiring (rare)

Read More: How to change the Engine Oil

How to diagnose the P0522 Code?

  • Scan the P0522 code by using an OBD-II scanner. Utilize the freeze data to find the main problem. Clear the code and test drive your car. If the code returns, then move forward for further inspection.
  • Check the oil level. Your engine must have sufficient oil for optimum performance.
  • Inspect the oil condition. Your oil must be free from dirt and other contamination.
  • Check the oil pressure sensor electrical connections and wires.
  • Inspect the oil filters for damage or blockage.
  • Check the oil pan for a leak.
  • Check that the correct oil is being used.
  • Check the oil pressure sensor voltage by using an ohmmeter.
  • Use an oil pressure gauge to check the engine oil pressure.
  • Properly inspect the engine oil pressure sensor for fault.

Common P0522 Code Diagnostic Mistakes

  • Replacing the unnecessary components.
  • Not clearing the codes after fixing the issue.
  • Not properly inspecting all the parts.
  • Replacing the engine oil pressure sensor before inspecting the connections and wiring.

What repairs can fix the P0522 Code?

  • Inspecting the oil level and adding more oil if needed
  • Replacing the bad oil filters
  • Replacing the dirty oil
  • Using the perfect viscosity oil according to the manufacturer’s recommendation
  • Fixing the oil pressure sensor’s damaged or corroded wiring
  • Replacing the faulty engine oil pressure sensor
  • Cleaning the blocked oil filter

P0522 Code Repair Cost

The repair or fixing cost of the P0522 code depends on the nature of the problem. To fix this trouble code, you need to repair one or more of the below-given parts:

Oil filter replacement$30 to $80
Oil replacement cost$15 to $70
Oil pan replacement$650 to $750
Oil pressure sensor replacement$120 to $150

FAQ Section

How serious is the P0522 Code?

The severity level of the P0522 trouble code depends on the main issue. The P0522 indicates a problem with the engine oil pressure sensor. Your vehicle’s oil must have sufficient pressure to lubricate the engine parts properly. If your vehicle rotating parts will not properly lubricate, they may damage. If this trouble code has been stored for a long time and the oil has actually been low during this time, your engine may damage badly.

Where is the oil pressure sensor located?

The oil pressure sensor is most commonly installed near the bottom or side of an engine, between the oil pan and the oil filter.

What happens when the oil pressure sensor fails?

When the oil pressure sensor becomes faulty, it doesn’t measure the correct oil pressure in the engine and sends the wrong information to the powertrain control module (PCM). When PCM gets wrong information, it triggers a fault code and turns on the check engine light.

When the oil pressure sensor goes bad, you may face different drivability issues, such as poor fuel economy, misfiring, or hard engine starting conditions.

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