Intake Manifold Runner Control Circuit/Open Bank 2
The intake manifold runner control valve or solenoid on Bank 2 is not responding correctly, causing the air intake flaps to remain open when they should be closed or vice versa. This prevents the engine from creating the proper air swirl pattern needed for efficient combustion, affecting engine performance.
What You Might Notice
- Rough or uneven idle
- Engine surging or hesitation during acceleration
- Reduced low-end torque
- Check engine light on or blinking intermittently
- Possible loss of fuel economy
Most Common Causes
- 1
Intake Manifold Runner Control Solenoid Failure
The solenoid that controls the runner flaps on Bank 2 is stuck, corroded, or electrically faulty, preventing proper operation of the intake manifold runners.
- 2
Wiring or Connector Issues
Damaged, corroded, or loose wiring and connectors to the Bank 2 runner control solenoid can break electrical continuity and prevent the valve from operating.
- 3
Stuck or Carbon-Fouled Runner Flaps
The intake manifold runner flaps themselves may be stuck open or closed due to carbon buildup or mechanical binding, preventing normal operation.
- 4
ECM or PCM Control Module Fault
A problem with the engine control module's ability to command the runner solenoid can cause the circuit to appear open even if the solenoid is functional.
How to Diagnose It
- 1
Check Intake Manifold Runner Control Solenoid Failure — The solenoid that controls the runner flaps on Bank 2 is stuck, corroded, or electrically faulty, preventing proper operation of the intake manifold runners.
- 2
Check Wiring or Connector Issues — Damaged, corroded, or loose wiring and connectors to the Bank 2 runner control solenoid can break electrical continuity and prevent the valve from operating.
- 3
Check Stuck or Carbon-Fouled Runner Flaps — The intake manifold runner flaps themselves may be stuck open or closed due to carbon buildup or mechanical binding, preventing normal operation.
- 4
Check ECM or PCM Control Module Fault — A problem with the engine control module's ability to command the runner solenoid can cause the circuit to appear open even if the solenoid is functional.
How to Fix It
- 1
Inspect and Clean Wiring Harness
Check the wiring and connectors connected to the Bank 2 intake manifold runner control solenoid for corrosion, damage, or loose connections. Clean or repair as needed and test for proper voltage signal.
- 2
Replace Intake Manifold Runner Control Solenoid
Test the solenoid with a multimeter or apply direct power to verify operation. If the solenoid does not respond or shows infinite resistance, replace the solenoid valve on Bank 2.
- 3
Clean or Replace Intake Manifold
If the runner flaps are stuck or carbon-fouled, the intake manifold may need to be removed, cleaned, and reassembled, or replaced if internal damage is present.
- 4
Scan for Additional Codes and Retest
Clear the fault code using a diagnostic scanner, perform a test drive, and rescan to confirm the issue is resolved. If the code returns, consult the vehicle-specific service manual for advanced diagnostics.
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