P06DE on Cadillac: How to Diagnose & Fix
Engine Oil Pressure Control Circuit Stuck On
1 Cadillac model · 1 documented issue · $50-$2,000 repair
P06DE on Cadillac by model: symptoms, diagnosis and fix
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. GM has not published a specific root cause for the XT4, but its engine oil consumption bulletin 01-06-01-011 (revisions N and O list the XT4) gives dealers guidelines and diagnostic/repair steps for oil consumption concerns.
Common Symptoms
- Low oil level between changes
- Low oil pressure warning
- Oil smell from exhaust
- Blue haze on hard acceleration
How to Fix
Monitor oil level between changes and top off as needed. Use only Dexos1 Gen3 certified 0W-20 synthetic oil. Have the PCV system inspected for proper function. If consumption exceeds 1 quart per 2,000 miles, ask the dealer to run the oil consumption test in GM bulletin 01-06-01-011. Document consumption for warranty purposes.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (2)
P06DE code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P06DE mean on a 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 it is documented across 1 model: XT4.
What are the most common causes of P06DE?
The most common causes of P06DE are: 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). The specific cause varies by vehicle.
How much does it cost to fix P06DE on a Cadillac?
Published repair estimates on Cadillac range from $50 to $2,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.