P0664 code meaning
Intake Manifold Tuning Valve Control Circuit Low Bank 2
Powertrain system Generic code P06xx codes Check engine light
What P0664 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). P0664 means the bank 2 control circuit voltage is too low with the driver off – typically a short to ground; with GM-style logic an open circuit is included. Bank 2 codes require a V-engine manifold with two separately switched valves; many V engines use a single central valve between the plenums, and no manufacturer document available to us uses this code, so the description follows bank 1. At GM the bank 1 equivalent (P0661) flags 0.5 Ω or less to ground in 40 of 50 samples, with the lamp after two trips.
P0664 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 P0664
- Check engine light (depending on the maker)
- Loss of power in part of the rev range
- Actuator does not click when switching
Common causes of P0664
- Most likelyBank 2 control wire shorted to ground
- PossibleBank 2 actuator shorted internally to ground
- PossibleOpen circuit (included with GM-style logic)
- 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 P0664 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. |
| 64 | The exact fault in that area. |
What to do next
- Note P0664 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 P0664
What does P0664 mean?
P0664 means "Intake Manifold Tuning Valve Control Circuit Low Bank 2". 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 P0664?
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 P0664 fail an emissions test?
Yes, it can. P0664 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 P0664 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 P0664 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.