P0662 code meaning
Intake Manifold Tuning Valve Control Circuit High Bank 1
Powertrain system Generic code P06xx codes Check engine light
What P0662 means
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.
P0662 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P0662
- Check engine light (depending on the maker)
- Loss of power in part of the rev range
- Actuator does not click when switching
Common causes of P0662
- Most 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
- Less likelyOutput driver in the engine module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Intake manifold tuning valveValve actuatorActuator wiring
What each part of P0662 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 6 | Area: computer (engine control module) and output circuits. |
| 62 | The exact fault in that area. |
What to do next
- Note P0662 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0662
What does P0662 mean?
P0662 means "Intake Manifold Tuning Valve Control Circuit High Bank 1". 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). It is a generic code, so it means the same on every make.
Is it safe to drive with P0662?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0662 fail an emissions test?
Yes, it can. P0662 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0662 to fix?
Difficulty: easy. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0662 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.