P1512
Intake Manifold Runner Control Stuck Closed Bank 1
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Reduced engine power at high speeds
- Uneven engine operation
- Increased fuel consumption
- Check engine light comes on
- Dips during acceleration
Causes
- Mechanical jamming of the IMRC damper
- Malfunction of the solenoid valve or vacuum actuator
- Open or short circuit in control circuit
- Damper position sensor malfunction
- Carbon accumulation in the intake system
How to Fix
- Visual inspection of IMRC dampers for mechanical damage
- Checking the Solenoid Valve/Vacuum Actuator
- Control circuit and wiring harness diagnostics
- Cleaning the intake manifold flaps and ducts
- Replacement of faulty components (drive, position sensor)