P06DE on Cadillac
Engine Oil Pressure Control Circuit Stuck On
P06DE on Cadillac vehicles indicates engine oil pressure control circuit stuck on. Au7o has documented this code across 1 Cadillac model — most commonly on XT4. 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 Cadillac range from $50 to $2,000, 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 Cadillac by Model
Cadillac XT4(1 issue)
- 2.0L Turbo Excessive Oil Consumption2019-2025
The 2.0L turbocharged engine in the XT4 consumes oil at a higher-than-expected rate, with some owners reporting a quart consumed every 2,000-3,000 miles. The issue is related to the piston ring design and turbocharger oil scavenge system. GM has not issued a formal service bulletin addressing the root cause.
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View P06DE across all makes →Frequently Asked Questions
What does P06DE mean on Cadillac?▼
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 Cadillac specifically, this code is documented across 1 model.
What causes P06DE on Cadillac vehicles?▼
Common causes on Cadillac: 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 Cadillac?▼
Repair costs on Cadillac range from $50 to $2,000, depending on the specific model and root cause.
Which Cadillac models have P06DE documented?▼
Au7o has documented P06DE on 1 Cadillac model: XT4.