Code result
P3433
Cylinder 4 Deactivation Performance
Moderate severity
What it means
The engine control module has detected that cylinder 4 deactivation does not perform as expected — the actual cylinder behavior does not match the commanded state.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Lifter stuck
highOne of the most commonly reported causes for this code — check this first.
Deactivation solenoid failed
mediumA plausible cause — test and verify before replacing parts.
Related help
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