P0660 code meaning
Intake Manifold Tuning Valve Control Circuit/Open Bank 1
Powertrain system Generic code P06xx codes Check engine light
What P0660 means
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.
P0660 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P0660
- 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
Common causes of P0660
- Most likelyActuator connector loose, corroded or spread
- Most likelyActuator coil or motor open internally
- PossibleBroken or chafed wire (control or supply)
- Less likelySupply (fuse, main relay) to the actuator missing
- Less likelyOutput driver in the engine module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Intake manifold tuning valveValve actuatorActuator wiring
What each part of P0660 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 6 | Area: computer (engine control module) and output circuits. |
| 60 | The exact fault in that area. |
What to do next
- Note P0660 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0660
What does P0660 mean?
P0660 means "Intake Manifold Tuning Valve Control Circuit/Open Bank 1". 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). It is a generic code, so it means the same on every make.
Is it safe to drive with P0660?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0660 fail an emissions test?
Yes, it can. P0660 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0660 to fix?
Difficulty: easy. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0660 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.