Intake Manifold Runner Control Stuck Open (Bank 1)
This code indicates that the intake manifold runner control is stuck in the open position.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
When you see this code, the system that controls air flow through the intake manifold isn't working properly. It should change to control how much air enters the engine, but right now it’s stuck open.
What the computer is actually seeing
The engine control module (ECM) looks for a change in the position of the intake manifold runner during operation. When it commands the runner to close, it should see a corresponding voltage drop. If it sees the voltage remain the same when it should have changed, it sets this code.
What a healthy reading looks like
The intake manifold runner position should vary between 0-100% based on throttle position and engine load. A stuck open condition will usually show a position at or near 100% when it should be lower during certain conditions.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check for other related codes and freeze frame data. Document any additional issues.
- 2Inspect the wiring and connectors to the intake manifold runner control valve. Look for damage, corrosion, or disconnections. Repair if necessary.
- 3Visually inspect the intake manifold runner control valve for physical damage or blockage. Manually operate the valve if possible to check for proper function.
- 4Use a scan tool to monitor the intake manifold runner position at idle and under load. Confirm that it changes as expected according to throttle input and load conditions.
- 5If all previous checks are okay, replace the intake manifold runner control valve.
Common causes
- Damaged or faulty intake manifold runner control valve.
- Disconnected or damaged wiring or connectors related to the valve.
- Vacuum leaks in the intake manifold or associated components.
- Failed engine control module (ECM).
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but it's advisable to avoid heavy acceleration and drive with caution. Performance may be affected.
Will this code come back after clearing it?
It can come back if the underlying problem isn't fixed.
Why does this code sometimes appear with other codes?
Codes can appear together if multiple components in the air intake system are affected or if there's a common issue like a vacuum leak.
Working a real vehicle right now?
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