P0662 Intake Manifold Tuning Valve Control Circuit High (Bank 1)

P0662 indicates a high condition in the intake manifold tuning valve control circuit on Bank 1. The controller sees control voltage or feedback above the expected range.

Code details

Generic OBD-II · P0

System: Computer
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not condemn the PCM before checking Bank 1 tuning valve wiring, ground, and actuator movement.

Symptoms of P0662

Check-engine light, sometimes with several unrelated codes at once.
Warning lights, a no-start, or intermittent electrical faults.
Communication or module-reset problems on a scan tool.

Common causes of P0662

Low battery voltage, poor grounds, corroded connectors, or blown fuses.
Wiring or network (CAN bus) faults between modules.
A module software/programming issue, or rarely a failed controller.

Useful checks before replacing parts

Review Bank 1 tuning valve command, control voltage, driver status, manifold pressure response, freeze-frame load, and related high-input codes.
Inspect for short-to-voltage faults, open grounds, stuck relays or solenoids, connector corrosion, linkage binding, and harness damage near heat.
Command the valve and verify whether voltage, current, and physical runner movement change correctly.

Related OBD-II codes

These nearby computer entries can help compare wording and pin down the fault area.