P0665
Intake Manifold Tuning Valve Control Circuit High Bank 2
Fuel & air metering
Generic OBD-II
High
What it means
P0665 means the PCM saw a high (open or short-to-voltage) reading on the bank 2 intake manifold tuning valve control circuit. That valve changes the intake runner length to optimize torque across the RPM range, so a stuck circuit can cost some power and economy — but the engine still runs. Check the valve solenoid and its control wiring before replacing the PCM.
High
Can I keep driving? Drivable — you may notice some power loss or rough running at certain RPM, but the engine runs. Repair to restore full performance.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or torque, often in a specific RPM range
- Rough idle or occasional stalling
- Slightly poorer fuel economy
Common causes
Most likely first
- Faulty intake manifold tuning (IMT) valve/solenoid on bank 2Likely
- Open or short-to-voltage in the control wiring (high reading)Common
- Corroded or loose connector at the valveCommon
- PCM control-driver fault (less common)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame, then check the IMT valve control circuit on bank 2 for an open or short-to-power.
- Measure the valve solenoid resistance and compare to spec; replace if out of range.
- Inspect the connector and wiring for corrosion or damage.
- If the valve and wiring are good, suspect the PCM driver. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0665?+
Yes, generally. The intake tuning valve affects power delivery and economy, not safety — expect some performance loss until it's repaired.
Can I just clear P0665?+
It returns once the PCM commands the valve and sees the circuit high. Repair the valve or wiring first.
Related codes
Often seen with P0665
Read & clear P0665 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