Powertrain, generic · Computer and auxiliary outputs

P0662 Intake Manifold Tuning Valve Control Circuit High Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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.

Likely causes

Control wire shorted to battery or supply voltage (harness)
Actuator winding shorted (very low resistance, overcurrent)
Moisture or corrosion in the connector between supply and control pin
Output driver in the engine module faulty

Symptoms

  • Check engine light (depending on the maker)
  • Loss of power in part of the rev range
  • Actuator does not click when switching

Repair estimate

DifficultyEasyDIY possible
Parts and labour€20–350
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

intake manifold tuning valvevalve actuatoractuator wiring

Related codes

P0660P0661P0665P065EP2070

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.