DTC codes / P34xx · Auxiliary emission controls / P3450
P3450 indicates that the powertrain control module (PCM) has detected a performance fault in the cylinder 7 deactivation or intake valve control circuit, meaning the valve did not respond as commanded within the expected time or position. The PCM monitors valve lift or oil pressure and sets this code when the actual state does not match the commanded state for cylinder 7.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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