Intake Manifold Tuning Valve Performance Bank 1
The intake manifold tuning valve (IMT) on bank 1 - which switches the intake runners between long and short paths for torque optimisation - is electrically intact yet does not move as commanded. Carbon build-up, broken linkage, or seized actuator.
Affected components
- Intake manifold tuning valve b1
Common causes
- High likelihood: IMT valve stuck due to carbon
Possible symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.