P0662
Intake Manifold Tuning Valve Control Circuit High Bank 1
Intake manifold tuning
Generic OBD-II
Medium
What it means
P0662 means the control circuit for the bank-1 intake manifold tuning valve is reading high voltage, usually from a wiring short to voltage or a failed solenoid. This valve changes the intake runner length to optimize airflow across the rev range, so a fault mainly shows up as weaker power in part of the range — not a no-start. The car remains drivable while it's repaired.
Medium
Can I keep driving? Drivable — the engine runs, but you may notice weaker power in part of the rev range; fix it to restore full performance and economy.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power in the low or high rpm range
- Slight drop in throttle response or fuel economy
- Occasional rough idle
Common causes
Most likely first
- Faulty intake manifold tuning valve/solenoid on bank 1Likely
- Wiring shorted to voltage in the control circuit (drives the reading high)Common
- Corroded or loose connector at the valveCommon
- Poor ground affecting the control circuitLess often
- Faulty engine control module (ECM), rareLess often
How to diagnose & fix
Work through it in order
- Inspect the intake manifold tuning valve connector and wiring for a short to voltage or corrosion.
- Measure the solenoid's resistance and compare to spec.
- Check the control circuit and ground for damage.
- Replace the tuning valve/solenoid if it tests faulty.
- Clear the code and re-test for return.
FAQ
Quick answers
Is it safe to drive with P0662?+
Yes — the engine runs and the car is drivable. You may just notice it feels flat in part of the rev range until the tuning valve is repaired.
Can I just clear P0662?+
It returns while the circuit reads high. Repairing the wiring short or replacing the tuning valve is what actually clears it.
Related codes
Often seen with P0662
Read & clear P0662 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