P0662Intake Manifold Tuning Valve Control Circuit High Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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). P0662 means a short to voltage in the bank 1 control circuit: with the driver on, the low-side line should be pulled to ground, but the voltage stays high (0.5 Ω or less to positive); the driver protects itself and the valve is not actuated. 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 does not use P0662. The valve stays in its rest position, with a power loss around the switch-over speed.
- What you may notice
- Check engine light (depending on the maker)
- Loss of power in part of the rev range
- Actuator does not click when switching
- Likely causes
- LikelyControl wire shorted to battery or supply voltage (harness)
- PossibleActuator winding shorted (very low resistance, overcurrent)
- PossibleMoisture or corrosion in the connector between supply and control pin
- RareOutput driver in the engine module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.