What it means
The intake manifold runner control (IMRC) on bank 2 reports that flap movement does not match the commanded position within the allowed time window — either too slow, too short a stroke, or position feedback off-target.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The intake manifold runner control on bank 2 changes airflow through the intake passages, commonly by moving flaps with an actuator. The control module checks whether bank 2 movement and position feedback match its command. P200B sets when the bank 2 runner response is too slow, too short, or off target, which can point to restriction, actuator weakness, linkage wear, or feedback trouble.
Common causes
Most likely first.
- Carbon buildup restricts flap travel
- Actuator weak or vacuum supply low
- Linkage worn or disconnected
- Position feedback fault
Symptoms
- Check-engine light
- Reduced engine power or sluggish acceleration
- Hesitation or uneven engine response
How to diagnose it
- Check freeze-frame and live bank 2 command and position data to identify whether travel is delayed, limited, or reported incorrectly.
- Inspect bank 2 flaps and linkage for carbon restriction, binding, wear, play, or disconnection.
- Check the bank 2 actuator and its connector, wiring, and any vacuum supply for damage, leaks, or poor connections.
- Command bank 2 runner movement with a scan tool and compare physical travel with position feedback, where available.
- Test the actuator and position feedback circuit using the manufacturer's procedure if command and observed response disagree.
Common fixes
- Clean carbon or debris restricting bank 2 flap travel, if serviceable.
- Repair or replace worn or disconnected bank 2 linkage.
- Repair a faulty bank 2 vacuum supply, connector, or wiring.
- Replace a confirmed weak actuator or faulty position feedback sensor.
Can I keep driving?
If the engine is steady, limited gentle driving may be possible, but reduced power or hesitation can make acceleration less predictable. Avoid hard acceleration and have the bank 2 runner system checked soon to prevent ongoing drivability and emissions issues.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.