P0660Intake Manifold Tuning Valve Control Circuit/Open Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- The intake manifold tuning valve switches the manifold length or plenum connection with engine speed (more torque low, more power high); it is not the runner or swirl flap (IMRC, P2004 ff). P0660 means the control circuit of the bank 1 (or only) valve is open. GM evaluates the line voltage with the driver off: too low means the supply through the coil is missing (200 kΩ or more). GM's engines with this valve (low-side driver) check with ignition voltage of at least 11 V and the engine above 400 rpm and set the code after 40 of 50 samples (about 0.6 s), with the check engine light after two trips. Ford uses P0660 (older: P1549) as the electrical check of its actuator, which has no position feedback and stays closed and unpowered below about 2600 rpm – without the check engine light (5 s). The valve then stays in its rest position and power at high revs suffers.
- What you may notice
- Check engine light (GM after two trips; Ford without)
- Less power in the upper or middle rev range
- Actuator does not click at ignition on or when switching
- Likely causes
- LikelyActuator connector loose, corroded or spread
- LikelyActuator coil or motor open internally
- PossibleBroken or chafed wire (control or supply)
- RareSupply (fuse, main relay) to the actuator missing
- RareOutput driver in the engine module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.