Code result
P3493
Cylinder Deactivation Position Sensor Bank 2
Moderate severity
What it means
The engine control module has detected an implausible signal from the bank 2 cylinder deactivation position sensor. The sensor confirms switching lifter position; without a valid signal the module cannot safely command deactivation transitions on bank 2.
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
Position sensor failed
highOne of the most commonly reported causes for this code — check this first.
Wiring or connector fault
mediumA plausible cause — test and verify before replacing parts.
Lifter mechanically stuck
lowLess common, but worth ruling out after the more likely causes.
Related help
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