Code result
P3431
Cylinder 4 Exhaust Valve Control Circuit Low
Moderate severity
What it means
The engine control module has detected a low-side voltage fault (short to ground) on the cylinder 4 exhaust valve deactivation solenoid circuit. Cylinder deactivation is disabled while the fault is present.
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
Wiring shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Solenoid internal short
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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