What does code P3420 mean?

Q: What does code P3420 mean?

Cylinder 3 Deactivation/lntake Valve Control Circuit High. P3420 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the cylinder 3 deactivation or intake valve control solenoid. This circuit is used on engines with cylinder deactivation or variable valve timing to disable or adjust the intake valve for cylinder 3, and a high voltage reading typically means the circuit is open, shorted to power, or the solenoid has failed.

DTC codes / P34xx · Auxiliary emission controls / P3420

P3420Cylinder 3 Deactivation/lntake Valve Control Circuit High

P3420 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the cylinder 3 deactivation or intake valve control solenoid. This circuit is used on engines with cylinder deactivation or variable valve timing to disable or adjust the intake valve for cylinder 3, and a high voltage reading typically means the circuit is open, shorted to power, or the solenoid has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.