P0524: How to Diagnose & Fix — Engine Oil Pressure Too Low

The 2.7L V6 in the Magnum is notorious for oil sludge buildup that clogs oil passages and starves critical engine components of lubrication. The engine has a small oil pan, undersized oil pump, and a water pump design that can leak coolant internally. Combined with the crankcase ventilation system allowing hydrocarbons to break down oil additives, these factors cause thick sludge to form even with regular oil changes. Oil starvation damages bearings, camshafts, and timing chain components, often leading to catastrophic engine failure at relatively low mileage.

Certain 2020-2023 Ford Escape HEV and PHEV models equipped with the 2.5L Atkinson-cycle hybrid engine can suffer from isolated manufacturing defects that cause the engine block or oil pan to breach. When this occurs, significant quantities of engine oil and/or fuel vapor are released into the hot engine bay, creating an underhood fire risk. The failure affects engines manufactured on or before September 1, 2022. Ford issued Safety Recall 23S27 (NHTSA 23V380000) to address this. No engine block breaches have been reported on engines built after September 1, 2022.

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.

The Cadenza's 3.3L Lambda II GDI V6 is covered under the Hyundai/Kia engine settlement for connecting rod bearing failure. Manufacturing debris in the crankshaft oil passages can restrict oil flow to the connecting rod bearings, causing premature wear and eventual engine seizure. Kia extended the engine warranty to 15 years/150,000 miles. The issue typically manifests as a knocking noise from the bottom end of the engine, often preceded by an illuminated oil pressure warning light.

The 3.0L EcoDiesel V6 suffers documented bottom-end failures: the main bearings (most common) and connecting-rod bearings wipe out, dropping oil pressure to the rods, spinning a rod bearing and sometimes snapping the crankshaft if driven on. Factory main-bearing clearances are very tight (~0.0015 in), so the combination of high load at low rpm, torsional vibration, and hot thin oil wipes a bearing. A contributing failure is the plastic-bodied oil cooler/check valve, which can fail under sustained high oil temperature (especially towing) and contaminate the oil — accelerating bearing damage. These are catastrophic, often-low-mileage failures distinct from the previously covered EGR-cooler and CP4 fuel-pump issues.