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Electronic fuel injection systems generally rely on the powertrain control module (PCM) to operate the fuel injectors to deliver fuel to the engine cylinders. If the PCM detects a problem with the fuel injector on cylinder #1, the vehicle’s computer will log a P0261 code on a scan tool.

What Does the P0261 Code Mean?

Diagnostic trouble code P0261 stands for “Cylinder 1 Injector Circuit Low.” This is a generic powertrain code that applies to select vehicles with OBD-II.

Fuel injection systems are designed to provide the engine with the proper amount of fuel in all of its operating modes. This means that fuel being delivered to the engine is neither too lean nor too rich. However, if one of the fuel injectors breaks down, the fuel mixture can turn lean if the fuel spray pattern is reduced. On the other hand, if an injector is stuck open, a rich mixture can result.
If the PCM detects a low voltage condition in the fuel injector circuit for the #1 cylinder, the vehicle’s computer will set the code P0261.

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car cylinder with injectors
If the PCM detects a low voltage condition in the fuel injector circuit for the #1 cylinder, it will set the P0261 code.

Note: The definition of code P0261 might 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 P0261 Code?

What are the Common Symptoms of the P0261 Code?

How to Diagnose the P0261 Code

Specific diagnostic steps must be followed to diagnose a DTC P0261. These steps can vary depending on the vehicle’s make and model. Make sure to consult your vehicle’s repair manual to find the right fix for your DTC’s underlying issues.

However, if you don’t have the required auto repair skills and knowledge, you can hire a mechanic to do the job for you. They can run the necessary tests to know the problems associated with this code.

See also  P0307 Code: Cylinder #7 Misfire Detected

How to Fix the P0261 Code

There’s no quick and easy solution to troubleshooting a P0261 code. You’ll have to identify the underlying causes of this code to figure out the appropriate fix. Luckily, there are many OBD-II resources available online to assist you in diagnosing and repairing your car. To learn more about your car and potential issues, we suggest getting Chilton repair manuals and subscribing to ALLDATA.

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Replacement – Fuel Injector, with Red Connector
, P0261 Code: Cylinder 1 Injector Circuit Low
$17.49 Price and rating may change from the time content is published.
Replacement – Fuel Injector, Blade Type, 2-Prong Male Terminal, Includes O-Ring
, P0261 Code: Cylinder 1 Injector Circuit Low
$21.54 Price and rating may change from the time content is published.
Replacement – Fuel Injector – New, Sold individually
, P0261 Code: Cylinder 1 Injector Circuit Low
$17.49 Price and rating may change from the time content is published.
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Reviewed By Contact Center Manager and Technical Reviewer at CarParts.com

William “Bill” Guzenski has produced hundreds of how-to videos for the automotive community. He’s an ASE Certified Master Automobile Technician, and is affiliated with the Specialty Equipment Market Association (SEMA). He loves attending race events and car shows throughout the country, as well as traveling in his 40-foot motorhome, exploring abandoned mines and ghost towns.

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.

File Under : OBD-II Trouble Codes Tagged With :
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