P0520 on Jeep: How to Diagnose & Fix
Engine Oil Pressure Sensor/Switch Circuit Malfunction
1 Jeep model · 1 documented issue · 1 critical
P0520 on Jeep by model: symptoms, diagnosis and fix
Some Grand Wagoneer models with the 3.0L Hurricane inline-six twin-turbo engine exhibit oil consumption exceeding 1 quart per 1,000-2,000 miles, well beyond Stellantis's stated acceptable limit of 1 quart per 2,000 miles. The high-output (510 hp) variant appears more affected than the standard-output version. Contributing factors include the tight piston ring tolerances required for the engine's high compression ratio, PCV system design, and the turbo oil drain-back system. Owners report needing to add oil between regular service intervals.
Common Symptoms
- Low oil level warning between service intervals
- Needing to add 1+ quart of oil every 1,000-2,000 miles
- Blue-tinged exhaust smoke on cold start or hard acceleration
- Oil smell from exhaust area
- Oil fouling on turbo outlet pipes
How to Fix
First, establish the consumption rate with a documented oil consumption test at the dealer (typically a 1,000-mile monitored period). If consumption exceeds 1 qt per 2,000 miles, Stellantis may authorize piston ring replacement under warranty. Use only Pennzoil Ultra Platinum 0W-30 (factory fill specification). Check the PCV valve for proper operation — a stuck-open PCV increases oil consumption significantly. Monitor oil level weekly using the dipstick (do not rely solely on the electronic oil level monitor, which has a delayed response).
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Pennzoil Ultra Platinum full-synthetic SAE 0W-40 motor oil, 1-quart bottleOEMPennzoil 550040856 / AutoZone SKU 452989
Correct-spec oil for a documented top-up or oil service after confirming the exact 3.0L High Output application Fitment/availability: SAE 0W-40 product meeting the required Stellantis MS-A0921 specification. The HO engine takes approxima…
- Genuine Mopar 68683357AA 3.0L engine-oil filterOEMMopar 68683357AA
Confirm VIN/current supersession before purchase; an oil/filter change is maintenance and does not itself diagnose or cure excessive consumption.
- Genuine Mopar 68358481AD positive-crankcase-ventilation valveOEMMopar 68358481AD
PCV replacement only after inspection/testing confirms the valve contributes to oil consumption or crankcase-pressure symptoms Fitment/availability: Cataloged for 2022-2024 Grand Wagoneer 3.0L. Confirm VIN and the current 2025 supersessi…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- WarningDo NOT ignore the oil consumption issue or just keep topping off. Document every oil addition with dated receipts showing the oil brand, quantity, and mileage. This documentation is critical for a warranty piston ring replacement claim. Stellantis requires proof of the consumption rate before authorizing the repair.
Sources for this issue (1)
P0520 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0520 mean on a Jeep?
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 Jeep it is documented across 1 model: Grand Wagoneer.
What are the most common causes of P0520?
The most common causes of P0520 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P0520 on a Jeep?
Repair costs vary widely with the root cause and Jeep model; each issue on this page carries its own estimate where one is published.
Looking for P0520 on a different make?
View P0520 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.