P0660: An intake tuning valve output fault is an electrical check

Ford identifies P0660 as the intake manifold tuning valve output electrical check. It is listed separately from the intake manifold runner control system described immediately above it. Similar intake-system names do not make their fault categories interchangeable.

Electrical output is the documented evidence

The IMTV check runs continuously and has a five-second monitoring duration. The summary explicitly states that this result does not illuminate the MIL in the described implementation. A vehicle can therefore retain this diagnostic concern without a check-engine lamp.

The source does not give a numerical voltage, resistance or actuator-travel threshold for P0660 on this page. It would be unsupported to borrow the nearby runner-position sensor limits and present them as tuning-valve circuit specifications.

Confirm the system before locating a part

The adjacent IMRC table covers commanded plate position, position-sensor range and control-circuit faults, with different monitoring durations. P0660's IMTV electrical category does not establish that intake runners are stuck open or that airflow has failed a performance test.

Use the actual engine's circuit diagram and complete code description to identify the controlled tuning-valve output. Verification should show that the relevant electrical check runs without repeating the fault. A visible movement or a change in intake sound can provide context, but does not replace the circuit's diagnostic evidence. The cited summary does not determine whether the actuator, wiring or controller output is responsible and supplies no automatic replacement instruction.

Source and applicability

This explanation covers the cited Ford monitor variants, not every vehicle displaying this code. Match the engine, sensor architecture and calibration before applying numerical limits.

Ford OBD summary, PDF page 142.