P0520 on Hyundai
Engine Oil Pressure Sensor/Switch Circuit Malfunction
P0520 on Hyundai vehicles indicates engine oil pressure sensor/switch circuit malfunction. Au7o has documented this code across 1 Hyundai model — most commonly on Entourage. This code indicates a general electrical fault in the circuit for the engine oil pressure sensor or switch. The computer monitors this circuit to know your oil pressure, and it has detected a signal that is missing, shorted, or otherwise out of the expected electrical range. This is typically a wiring or sensor problem rather than an actual loss of oil pressure, but because oil pressure is critical to engine life, it should never be ignored until confirmed. If oil pressure truly is low, serious engine damage can result.
Common Causes of P0520
- •Faulty oil pressure sensor or switch
- •Damaged, corroded, or loose wiring/connector at the sensor
- •Open or short in the sensor circuit wiring
- •Poor ground connection
- •Low engine oil level or genuinely low oil pressure
- •Failed PCM/ECM (less common)
P0520 on Hyundai by Model
Hyundai Entourage(1 issue)
- 3.8L Lambda V6 Engine Knock and Connecting Rod Bearing Failure2007-2009
The 3.8L Lambda V6 in the Entourage is affected by the same connecting rod bearing failure issue that plagued early Lambda engines across the Hyundai/Kia lineup. Manufacturing debris left in the oil passages can restrict oil flow to the connecting rod bearings, causing premature bearing wear and eventual rod knock. Hyundai extended the engine warranty to 15 years/200,000 miles under a settlement. The issue typically manifests between 80,000-150,000 miles with a knocking noise from the lower engine.
Looking for P0520 on a different make?
View P0520 across all makes →Frequently Asked Questions
What does P0520 mean on Hyundai?▼
P0520 stands for "Engine Oil Pressure Sensor/Switch Circuit Malfunction." This code indicates a general electrical fault in the circuit for the engine oil pressure sensor or switch. The computer monitors this circuit to know your oil pressure, and it has detected a signal that is missing, shorted, or otherwise out of the expected electrical range. This is typically a wiring or sensor problem rather than an actual loss of oil pressure, but because oil pressure is critical to engine life, it should never be ignored until confirmed. If oil pressure truly is low, serious engine damage can result. On Hyundai specifically, this code is documented across 1 model.
What causes P0520 on Hyundai vehicles?▼
Common causes on Hyundai: Faulty oil pressure sensor or switch, Damaged, corroded, or loose wiring/connector at the sensor, Open or short in the sensor circuit wiring, Poor ground connection, Low engine oil level or genuinely low oil pressure. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0520 on a Hyundai?▼
Repair costs vary widely depending on the root cause and specific Hyundai model.
Which Hyundai models have P0520 documented?▼
Au7o has documented P0520 on 1 Hyundai model: Entourage.