P0660 Intake manifold tuning valve: open circuit (bank 1)

By: Diagno editorial team · Updated: 2026-10-15

P0660 means: Intake manifold tuning valve: open circuit (bank 1). The intake manifold has swirl or runner flaps that help the engine breathe better at different revs. Drive gently and have the car checked soon. The most common repair costs about €45–90 in Estonia, depending on make and model.

What it means

The intake manifold has swirl or runner flaps that help the engine breathe better at different revs. The computer found that the flaps don't move correctly or their sensor is faulty. The computer sees no current in the circuit, so something is open: a wire, a connector or the part's winding.

What you may notice

• Engine light on
• Less power at certain revs
• Idle may be uneven

What could be wrong

1. 1Connector loose, damp or corroded · Wiring or connector repair €45–90
2. 2Wire broken or chafed · Wiring or connector repair €45–90
3. 3Faulty actuator or sensor · Sensor replacement €80–160
4. 4Engine computer fault (rare) · Control unit check and software €150–300

Repair difficulty: Moderate

What you can check yourself

First look at the connector and wiring: anything loose, melted or green with corrosion? On some engines a flap can break off and fall into the engine, so don't put this off for long. Best left to a workshop. It needs a diagnostic tool and experience.

How we fix it

1. We read the fault data on the diagnostic tool and check whether the fault is constant
2. We measure the circuit's supply, ground and signal
3. We repair the wire or replace the connector
4. If the wiring is fine, we replace the actuator or sensor

Standard SAE description: Intake Manifold Tuning Valve Control Circuit/Open Bank 1