What does code P1549 mean?

P1549 · FordIntake Manifold Temperature Valve Vacuum Actuator Connection

P1549 on Ford vehicles indicates that the powertrain control module (PCM) has detected an electrical or mechanical fault in the vacuum actuator circuit for the intake manifold temperature (IMT) valve. The PCM monitors the actuator's connection and expected response; when the signal is missing, out of range, or the actuator fails to move as commanded, this code is stored.

SystemPowertrain

Code typeFord specific

SeverityLow

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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