Cylinder Deactivation System Performance
This code indicates a problem with the cylinder deactivation system's performance.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine is designed to shut off some cylinders under light load for better fuel economy, but it's detecting a fault that prevents it from doing that efficiently.
What the computer is actually seeing
The engine control module (ECM) sees inconsistent readings from the cylinder deactivation actuators or differences in the expected engine performance when in deactivation mode.
What a healthy reading looks like
The actuators should have a resistance between 5 to 10 ohms when checked. In deactivation mode, the engine should maintain a steady RPM with minimal vibration difference and no misfires.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the engine oil level and condition; ensure it's at the correct level and not contaminated.
- 2Inspect wiring and connectors to the cylinder deactivation solenoids for damage, corrosion, or loose connections. Repair or replace as needed.
- 3Test the resistance of the solenoids; expect 5 to 10 ohms. If outside this range, replace the solenoid.
- 4Monitor engine performance when the cylinder deactivation engages; note any misfires or engine roughness. If present, further testing is needed on the actuator.
Common causes
- Wiring harness issues or open circuits in the cylinder deactivation system
- Faulty cylinder deactivation solenoid or actuator
- Low engine oil pressure affecting cylinder operation
- Defective ECM or software issues
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but expect reduced fuel efficiency; service it soon to avoid further issues.
Will this code come back after clearing it?
Yes, if the underlying issue isn't resolved, the code will return after driving a short distance.
Why is it paired with misfire codes?
If the cylinder deactivation isn't functioning, it can lead to misfires since all cylinders aren't firing as they should.
Working a real vehicle right now?
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