P06DE on Buick
Engine Oil Pressure Control Circuit Stuck On
P06DE on Buick vehicles indicates engine oil pressure control circuit stuck on. Au7o has documented this code across 1 Buick model — most commonly on Envision. P06DE is a generic OBD-II code indicating the engine computer detected that the engine oil pressure control circuit, typically an oil control solenoid or actuator, is stuck on (energized) and not regulating oil pressure properly. Modern engines vary oil pressure for efficiency and to feed systems like variable valve timing, so a stuck circuit prevents proper control. This can lead to abnormal oil pressure, noisy valvetrain, rough idle, and reduced performance. Because oil pressure problems can quickly cause severe engine damage, this should be treated as urgent. Typical repair costs on Buick range from $180 to $650, depending on the specific model and root cause.
Common Causes of P06DE
- •Oil control solenoid stuck on or clogged with sludge/debris
- •Short to power keeping the solenoid energized
- •Low oil level or contaminated/degraded oil
- •Damaged wiring or connector in the control circuit
- •Failed oil pressure control solenoid/actuator
- •Faulty oil pressure sensor giving bad feedback
- •PCM/ECM fault (rare)
P06DE on Buick by Model
Buick Envision(1 issue)
- Fuel Dilution of Engine Oil from Stuck PCV Valve (2.0T LTG / 2.5L LCV)2016-2020
On Gen1 Envisions the crankcase ventilation (PCV) valve integrated into the cam cover sticks or fails, letting unburned fuel wash past the rings and accumulate in the crankcase. Owners find the oil level rising above the full mark, a strong gasoline smell in the oil, and a rich-running check engine light. GM addressed it with TSB 18-NA-246, which pairs a PCV valve replacement and oil change with an ECM recalibration. Left alone, the diluted oil loses viscosity and accelerates bearing and timing-chain wear.
Looking for P06DE on a different make?
View P06DE across all makes →Frequently Asked Questions
What does P06DE mean on Buick?▼
P06DE stands for "Engine Oil Pressure Control Circuit Stuck On." P06DE is a generic OBD-II code indicating the engine computer detected that the engine oil pressure control circuit, typically an oil control solenoid or actuator, is stuck on (energized) and not regulating oil pressure properly. Modern engines vary oil pressure for efficiency and to feed systems like variable valve timing, so a stuck circuit prevents proper control. This can lead to abnormal oil pressure, noisy valvetrain, rough idle, and reduced performance. Because oil pressure problems can quickly cause severe engine damage, this should be treated as urgent. On Buick specifically, this code is documented across 1 model.
What causes P06DE on Buick vehicles?▼
Common causes on Buick: Oil control solenoid stuck on or clogged with sludge/debris, Short to power keeping the solenoid energized, Low oil level or contaminated/degraded oil, Damaged wiring or connector in the control circuit, Failed oil pressure control solenoid/actuator. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P06DE on a Buick?▼
Repair costs on Buick range from $180 to $650, depending on the specific model and root cause.
Which Buick models have P06DE documented?▼
Au7o has documented P06DE on 1 Buick model: Envision.