A Nissan Altima Owner's Guide to the Intake Manifold Runner Valve (2002-2017)
If your Altima has a rough idle or a check engine light, this common and affordable part could be the reason.
- A faulty Intake Manifold Runner Valve is a very common issue on 2002-2017 Nissan Altimas.
- The most frequent symptom is a Check Engine Light with error code P2004.
- Nissan issued a TSB for this problem on 2.5L models from 2013-2017, indicating the sensor is the weak point.
- An affordable aftermarket part is a reliable and cost-effective solution for this common failure.
Is Your Altima's Check Engine Light On?
One of the most common reasons the check engine light comes on in a 2002-2017 Nissan Altima is a problem with the Intake Manifold Runner Control (IMRC) system. This system uses a valve, sometimes called a tumble control valve, to manage airflow inside the engine's intake manifold. While it seems complex, the valve itself is often a simple and affordable part to replace.
Common Symptoms of a Failing Runner Valve
When this valve or its sensor fails, your car's computer will notice. You will likely see a check engine light and may experience other performance issues.
- Check Engine Light: This is the most common sign. The code stored in the computer is often P2004, which means the valve is stuck open. 🎬 Watch: Understanding P2004 causes, symptoms, and diagnosis
- Poor Engine Performance: You might feel like your car is struggling, especially when you try to accelerate.
- Rough Idle: The engine may shake or sound uneven when you're stopped.
- Worse Gas Mileage: A faulty valve can make your engine less efficient, causing you to use more fuel.
- Engine Stalling: In more serious cases, the engine might stall at low speeds.
A Known Issue: TSB for 2013-2017 Altima 2.5L
Nissan is aware of this problem, especially on 2013-2017 Altimas with the 2.5L engine. They issued a Technical Service Bulletin (TSB) #NTB17-091 for the P2004 error code. The TSB suggests that the position sensor on the valve is the part that usually fails. The fix is to replace this sensor, which is attached to the intake manifold.
🎬 See this step-by-step guide to fixing the P2004 codeChoosing the Right Aftermarket Part
When shopping for a replacement, you'll see original equipment (OEM) parts and aftermarket parts. For a part like the intake manifold runner valve, a new aftermarket part offers a great balance of quality and price.
- OEM: This is the exact same part your car was built with. It's a guaranteed fit but is usually the most expensive option.
- Aftermarket (Replacement Brand): Aftermarket parts are made by companies other than the original manufacturer. A brand like "Replacement" focuses on providing a part that fits and works like the original but at a much lower cost. For this specific valve, which is a known failure point, a cost-effective aftermarket part is a smart choice for many owners.
| Part Type | Estimated Cost |
|---|---|
| New OEM | $80 - $150 |
| New Aftermarket | $30 - $75 |
| Shop Labor | $150 - $300 |
Note: Cost estimates are for the part only and can vary. Labor costs depend on local rates and the specific engine in your Altima.
Frequently Asked Questions
Can I replace the intake manifold runner valve myself?
While replacing the valve is mechanically simple, it's not always a good DIY job. The intake manifold often needs to be removed to access it. 🎬 Watch: How to remove and replace the intake manifold More importantly, after the new part is installed, the car's computer may need to be reset or relearn the new sensor's position using a special scan tool. Without this step, the check engine light may not turn off. For this reason, having a professional mechanic do the job is often recommended.
What is the error code P2004?
P2004 is a diagnostic trouble code (DTC) that means "Intake Manifold Runner Control Stuck Open (Bank 1)". On the 2002-2017 Altima, this almost always points to a problem with the runner control valve or its sensor.
Is it safe to drive with a bad intake manifold runner valve?
You can usually drive the car, but it's not ideal. You will experience reduced engine power and poor fuel economy. It's best to get it fixed soon to avoid putting extra stress on other engine components and to restore your car's performance.
Will a new valve fix my rough idle?
If the rough idle is caused by a faulty intake manifold runner valve, then yes, replacing it should solve the problem. A bad valve disrupts the proper air-fuel mixture, which is a common cause of a rough or unstable idle.
Helpful Videos
Technical Specifications
OEM Part Numbers: 14135-8J000
Controls butterfly valves inside the intake manifold to optimize airflow for different engine speeds.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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