P052E on Volvo
Positive Crankcase Ventilation Regulator Valve Performance
P052E on Volvo vehicles indicates positive crankcase ventilation regulator valve performance. Au7o has documented this code across 4 Volvo models — most commonly on S60, V60, V70. P052E indicates a performance problem with the positive crankcase ventilation (PCV) regulator valve, the valve that meters blow-by gases from the engine crankcase back into the intake to be burned. The computer monitors crankcase pressure or related readings, and when the PCV regulator isn't controlling flow within the expected range, it sets this code. Symptoms can include rough idle, oil leaks from seals due to pressure imbalance, whistling/sucking noises, or increased oil consumption. It points to the PCV valve or ventilation system rather than the fuel or ignition system. Typical repair costs on Volvo range from $100 to $5,000, depending on the specific model and root cause.
Common Causes of P052E
- •Stuck, clogged, or failed PCV regulator valve
- •Cracked or disconnected PCV hose/line
- •Vacuum leak in the crankcase ventilation system
- •Clogged PCV passages from sludge or carbon
- •Faulty crankcase pressure sensor
- •Damaged valve cover with integrated PCV (where applicable)
- •Wiring or connector fault on electrically controlled PCV valves
P052E on Volvo by Model
Volvo S60(1 issue)
- T5/T6 PCV Oil Trap System Failure and Oil Consumption2019-2023
The positive crankcase ventilation (PCV) system oil trap on the S60 T5 and T6 engines fails prematurely, causing excessive crankcase pressure, oil leaks, and increased oil consumption. The oil trap membrane hardens and cracks, allowing oil mist to enter the intake manifold and be burned in combustion. Failed PCV systems also cause boost leaks and rough idle. The oil trap is integrated into the valve cover on these engines, making replacement more expensive than older designs with external PCV valves. Volvo updated the oil trap design in mid-2022 production.
Volvo V60(1 issue)
- T5/T6 Engine Excessive Oil Consumption2019-2023
The V60 shares the same 2.0L T5 and T6 powertrains as the S60 and XC60, and experiences the same excessive oil consumption issue. Oil consumption of 1 quart per 2,000-3,500 miles is commonly reported, particularly at sustained highway speeds. The issue is more pronounced in T6 twin-charged models due to higher combustion pressures. Volvo has issued software updates and PCV system improvements, but the fundamental piston ring design limitation persists in earlier production years.
Volvo V70(1 issue)
- PCV Breather Box and Oil Trap Failure2001-2007
The P2 V70 whiteblock 5-cylinder PCV breather box and oil trap clog, causing oil leaks, turbo seal failure, and excessive oil consumption. The turbo models (T5) are especially affected as boost pressure exacerbates crankcase pressure issues.
Volvo XC90(1 issue)
- PCV Breather System Failure2003-2014
The Positive Crankcase Ventilation (PCV) system includes a breather box and hoses that degrade over time. When the PCV fails, it causes oil leaks, rough idle, and can blow out gaskets due to excessive crankcase pressure. This is a common issue on 5-cylinder Volvos.
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View P052E across all makes →Frequently Asked Questions
What does P052E mean on Volvo?▼
P052E stands for "Positive Crankcase Ventilation Regulator Valve Performance." P052E indicates a performance problem with the positive crankcase ventilation (PCV) regulator valve, the valve that meters blow-by gases from the engine crankcase back into the intake to be burned. The computer monitors crankcase pressure or related readings, and when the PCV regulator isn't controlling flow within the expected range, it sets this code. Symptoms can include rough idle, oil leaks from seals due to pressure imbalance, whistling/sucking noises, or increased oil consumption. It points to the PCV valve or ventilation system rather than the fuel or ignition system. On Volvo specifically, this code is documented across 4 models.
What causes P052E on Volvo vehicles?▼
Common causes on Volvo: Stuck, clogged, or failed PCV regulator valve, Cracked or disconnected PCV hose/line, Vacuum leak in the crankcase ventilation system, Clogged PCV passages from sludge or carbon, Faulty crankcase pressure sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P052E on a Volvo?▼
Repair costs on Volvo range from $100 to $5,000, depending on the specific model and root cause.
Which Volvo models have P052E documented?▼
Au7o has documented P052E on 4 Volvo models: S60, V60, V70, XC90.