What Does P0662 Mean?
The PCM has detected a high voltage condition in the intake manifold tuning valve (IMTV) control circuit for bank 1. This means the circuit is reading higher than the expected voltage range, typically indicating an open circuit or loss of ground. The IMTV cannot properly modulate runner length, which affects volumetric efficiency. The driver may notice a loss of mid-range torque, rough idle at certain conditions, or a slight decrease in fuel economy.
Common Causes
35%
Open circuit in IMTV solenoid control wiring
30%
Failed IMTV solenoid (open coil winding)
20%
Corroded or disconnected connector at IMTV
10%
Broken ground circuit for IMTV solenoid
5%
PCM driver circuit fault (open internally)
Diagnostic Steps
1
Check freeze frame data for engine RPM, load, and coolant temperature when the fault set to identify operating conditions.
2
Disconnect the IMTV solenoid connector on bank 1 and measure coil resistance — specification is typically 20-40 ohms. An open-loop (OL/infinite) reading confirms a burned-out solenoid.
3
With the connector disconnected, check for battery voltage on the power supply wire at the solenoid connector with the key on — absence of voltage indicates an open in the feed circuit.
4
Verify the ground circuit has continuity from the solenoid connector back to the PCM ground driver pin. Repair any open found in the harness.
5
If wiring and solenoid test good, use a scan tool to command the IMTV solenoid and monitor the circuit voltage at the PCM connector — if voltage does not toggle, suspect a PCM driver failure.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
The PCM has detected a high voltage condition in the intake manifold tuning valve (IMTV) control circuit for bank 1. This means the circuit is reading higher than the expected voltage range, typically indicating an open circuit or loss of ground. The IMTV cannot properly modulate runner length, whic...
The most common cause of P0662 (Intake Manifold Tuning Valve Control Circuit High (Bank 1)) is: Open circuit in IMTV solenoid control wiring
Typical repair costs for P0662 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive in most conditions. The intake tuning valve defaults to one position, reducing engine efficiency. You may notice slightly reduced power in certain RPM ranges. No immediate safety hazard exists, but have it addressed within a few weeks to prevent carbon buildup issues.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0662 to identify the root cause.
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Quick Info
Category
Powertrain
System
Intake / Air Management
Difficulty
Type
Generic (SAE)
Recommended Tools
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