P0664
Intake Manifold Tuning Valve Control Circuit Low Bank 2
Intake manifold tuning
Generic OBD-II
High
What it means
P0664 means the control circuit for the bank 2 intake manifold tuning (IMT) valve is reading low — typically a short to ground or an open. This valve changes the effective length of the intake runners to broaden the torque curve, so a fault usually shows up as reduced power in part of the rev range and a small economy loss. It doesn't cause a no-start, and the common causes are the valve or its wiring.
High
Can I keep driving? Safe to keep driving in the short term — expect some loss of low-end or top-end torque, but no risk of it stranding you.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or torque, especially in part of the rev range
- Slightly rough idle in some vehicles
- Minor drop in fuel economy
Common causes
Most likely first
- Short to ground on the intake manifold tuning (IMT) valve control circuit, bank 2Likely
- Faulty IMT valve/solenoidCommon
- Damaged or corroded wiring or connectorCommon
- ECM fault (rare)Less often
How to diagnose & fix
Work through it in order
- Inspect the bank 2 IMT valve connector and wiring for a short to ground or corrosion.
- Measure the valve/solenoid resistance and check for the control signal from the ECM.
- Replace the intake manifold tuning valve if it's shorted or not actuating.
- Repair any wiring faults, then clear the code and re-test for normal power delivery.
FAQ
Quick answers
Is it safe to drive with P0664?+
Yes, for normal driving. You may notice reduced torque in part of the rev range, but it won't leave you stranded. Fix it to restore full performance and economy.
Can I just clear P0664?+
It returns until the valve or its circuit is repaired. Clear it after the fix to confirm the tuning valve is working.
Related codes
Often seen with P0664
Read & clear P0664 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX