P0521 on Infiniti
Engine Oil Pressure Sensor/Switch Range/Performance
P0521 on Infiniti vehicles indicates engine oil pressure sensor/switch range/performance. Au7o has documented this code across 1 Infiniti model — most commonly on G37. This code indicates the engine oil pressure sensor or switch is sending a reading that is implausible or out of its normal operating range — for example, the value doesn't match what the engine's speed and conditions should produce. Unlike a simple circuit fault, this means the signal is present but doesn't make sense (range/performance). It can be caused by a failing sensor, wiring issues, or by genuinely abnormal oil pressure. Because oil pressure protects the engine, a true low-pressure reading should be confirmed and taken seriously. Typical repair costs on Infiniti range from $400 to $1,400, depending on the specific model and root cause.
Common Causes of P0521
- •Faulty or worn oil pressure sensor/switch
- •Low engine oil level or actual abnormal oil pressure
- •Wiring or connector corrosion/damage at the sensor
- •Sludge or debris affecting the sensor reading
- •Use of incorrect oil viscosity
- •Failing oil pump
- •Poor electrical ground
P0521 on Infiniti by Model
Infiniti G37(1 issue)
- Cam Cover Gasket Leak Causing Low Oil Pressure2008-2011
On pre-2012 VQ37VHR engines the cam cover gaskets fail and leak, and unlike an ordinary valve cover weep this one matters mechanically: the leak path bleeds down oil pressure feeding the top end. Low oil pressure on this engine starves the VVEL assembly and the cam and rod bearings, and owners who dismiss the leak as a minor seep have lost engines to it. The visible signs are oil pooling in the spark plug wells, oil on the exhaust manifolds producing a burning smell and smoke from under the hood, and a low oil pressure warning or gauge reading that comes up at idle when hot.
Looking for P0521 on a different make?
View P0521 across all makes →Frequently Asked Questions
What does P0521 mean on Infiniti?▼
P0521 stands for "Engine Oil Pressure Sensor/Switch Range/Performance." This code indicates the engine oil pressure sensor or switch is sending a reading that is implausible or out of its normal operating range — for example, the value doesn't match what the engine's speed and conditions should produce. Unlike a simple circuit fault, this means the signal is present but doesn't make sense (range/performance). It can be caused by a failing sensor, wiring issues, or by genuinely abnormal oil pressure. Because oil pressure protects the engine, a true low-pressure reading should be confirmed and taken seriously. On Infiniti specifically, this code is documented across 1 model.
What causes P0521 on Infiniti vehicles?▼
Common causes on Infiniti: Faulty or worn oil pressure sensor/switch, Low engine oil level or actual abnormal oil pressure, Wiring or connector corrosion/damage at the sensor, Sludge or debris affecting the sensor reading, Use of incorrect oil viscosity. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0521 on a Infiniti?▼
Repair costs on Infiniti range from $400 to $1,400, depending on the specific model and root cause.
Which Infiniti models have P0521 documented?▼
Au7o has documented P0521 on 1 Infiniti model: G37.