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Some modern vehicles come equipped with a short runner valve that boosts engine performance. Over time, issues with your ride’s performance can arise due to a fault in this valve.  Code P1004 is a trouble code related to a possible fault in your short runner valve system.

What Does the P1004 Code Mean?

Diagnostic trouble code (DTC) P1004 stands for “Short Runner Control Valve Control Performance.”

Error code P1004 code is not a general trouble code, so its meaning can vary significantly across vehicles. For Chevrolet, for example, this error code can be related to the NOx sensors instead of the short runner valve.

nox sensor triggers p1004 code in chevrolet
For Chevrolet, for example, the P1004 code can be related to the NOx sensors instead of the short runner valve. 

P1004 for a Dodge Charger

For Dodge vehicles, the code means that the powertrain control module (PCM) detects a possible problem with the intake manifold pressure sensor or circuit.

See also  P0606 Code: Control Module Processor

The short runner valve system boosts engine performance by helping air pass through between the intake manifold interface and manifold plenum.

A sensor is used to measure intake manifold pressure. It sends data to the PCM through voltage readings. The data coming from this sensor is crucial because it helps regulate air-fuel ratio and engine timing.

Once the PCM detects that there’s an issue with the voltage reading, it’ll trigger the P1004 code.

You can learn more about intake manifold runner control in our technical discussion about IMRC systems.

Note: The definition of the P1004 code can be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What Are the Common Causes of the P1004 Code?

  • Bad short runner valve assembly
  • Open or shorted harness
  • Electrical connection issues
  • Faulty PCM

What Are the Common Symptoms of the P1004 Code?

The symptoms for this trouble code can vary depending on your ride’s make and model. Here are some common symptoms for a Dodge Charger.

How to Diagnose the P1004 Code

P1004 is not a general trouble code, so diagnosing the issue comes with many challenges. For one, there is no one solution that can work for all vehicles. If you’d like to diagnose this issue on your own, make sure that you find the diagnostic steps that’ll work for your specific make and model.

See also  P0174 Code: System Too Lean (Cylinder Bank 2)

If you’re in doubt, you can always take your vehicle to an auto repair shop for a proper diagnosis. If you’re an experienced DIYer, you can go ahead and do it yourself.

How to Fix the P1004 Code

Don’t attempt to resolve a P1004 code if you don’t have the knowledge and tools to diagnose the issue. You might end up doing more harm to your vehicle. Remember that you can always take your car to an auto repair shop and ask a licensed mechanic to repair your ride.

If you’re a seasoned DIYer, make sure that you have your tools prepared before you start with the repair. We also advise researching the issue first to ensure that you’re doing the repair steps will work for your specific make and model.

Vehicle-specific guides from resources like Chilton or an ALLDATA subscription might have the information you need to clear this trouble code.

About The Authors
Richard McCuistian, ASE Certified Master Automobile Technician
Reviewed By Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

CarParts Research Team
Written By Research Team

Automotive and Tech Writers

The Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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