Positive crankcase ventilation valve fault (P052E)
ENGINE
77 quejas de NHTSA · 2022-06 → 2025-12 (of 200 shown / 315 total complaints)
“Vehicle developed OBD-II code P052E related to crankcase ventilation/PCV system malfunction. Issue causes improper crankcase pressure, rough idle, oil vapor smells, and check engine light. Independent research shows this is a common failure on 2015–2017 Mercedes C300 models.…”
“code P052E on 71000 miles. The crankcase vent valve replacement.”