What does P1549 mean on a Ford?

P1549. Intake Manifold Communication Control Circuit Malfunction. Applies to Mustang, Taurus SHO with IMCC.

What causes P1549 on a Ford?

Open or shorted IMCC circuit Failed IMCC actuator Blown IMCC fuse Corroded connector PCM driver fault

How do I fix P1549 on a Ford?

Check the IMCC fuse Test actuator resistance Command the system and verify response Inspect wiring and connector Replace the actuator after circuit proof

Code

P1549

Intake Manifold Communication Control Circuit Malfunction

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Mustang, Taurus SHO with IMCC
Related: No single generic twin. See OBD Codes List

Findings, check these first

Open or shorted IMCC circuit
Failed IMCC actuator
Blown IMCC fuse
Corroded connector
PCM driver fault

Standard procedure

Check the IMCC fuse
Test actuator resistance
Command the system and verify response
Inspect wiring and connector
Replace the actuator after circuit proof

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: checked against the recorded source material.

OBDII.pro: P1549 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1549: IMCC Circuit Malfunction, Bank B
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
P1549 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1549: Intake Manifold Communication Control Circuit Malfunction
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.

Last updated 2026-09-06.

Report a correction for P1549. Include your vehicle, the issue and a source if you have one.