What Is the P2105 Code?
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The definition of code P2105 is “Throttle Actuator Control System – Forced Engine Shutdown.” This code indicates that your vehicle’s powertrain control module (PCM) or engine control module (ECM) has identified that the electronic throttle control system (ETC system) is malfunctioning for some reason. As a generic powertrain code, you may find this code in any OBD-II-equipped vehicle.
More About the P2105 Code
The ETC system or throttle actuator control system (TAC system) is an electric actuator motor that controls the opening of the throttle valve. This replaces conventional throttle bodies, which is a mechanical linkage between the accelerator pedal and throttle body that you’ll find in older vehicles. With this system, the accelerator pedal position sensor (APP sensor) informs the PCM of how much power is being requested. This code indicates that the system is operating incorrectly, causing it to operate in forced idle shutdown mode.
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What Are the Symptoms of a P2105 Code?
The most common symptoms of the P2105 code are actually severe drivability issues. In about every case, the P2105 code will result in the vehicle moving into limp mode or limp home mode, which is a vehicle mode that reduces function to minimize possible engine damage. In fail-safe or limp mode, your vehicle will likely only be able to go under a specific speed, and certain systems, like your air conditioning and cruise control, might not work. You’ll also likely see the check engine light and possibly other warning lights turn on.
What Are Some Causes of a P2105 Code?
Most of the time, the P2105 code is related to either a sensor malfunction, which could include the manifold absolute pressure sensor (MAP sensor), mass airflow sensor, APP sensor, throttle position sensor, or throttle plate position sensor, or to an actual faulty throttle actuator. In some cases, this fault code could be related to an issue with your electrical connection, like connector pins in your wiring harness or loose connections throughout the system. In rare cases, it could be a problem related to the PCM, including a faulty PCM or a PCM programming issue.
How Serious Is the P2105 Code?
The P2105 OBD-II trouble code should be considered pretty serious, largely because it has a defined impact on your vehicle’s drivability. The throttle actuator control system is a critical part of your vehicle’s ability to drive; without a well-functioning throttle actuator control system, it’s very likely that you’ll have a difficult time driving properly, even if your vehicle doesn’t enter fail-safe or limp mode for some reason. Always assume that this code impacts your throttle response and consider it very serious.
Can I Still Drive with a P2105 Code?
You may not physically be able to drive with this error code. It’s fairly common for this diagnostic trouble code to result in severe drivability issues, up to and including being unable to use your throttle reliably. Issues with reliable operation are always a problem. Even if you can physically drive, it’s still a good idea to avoid driving with code P2105 on your vehicle, as it might cause serious drivability problems that can be a safety concern.
How Easy Is It to Diagnose a P2105 Code?
It can be a bit difficult to diagnose the P2105 code. This is because issues related to the throttle body and the general throttle control system can be very easy to mess up when DIYing a fix. There are all sorts of common mistakes that you’ll have to avoid, and the diagnosis time for a DIYer will likely be higher than for a professional. When it comes to a component of your vehicle that’s this important to function, avoid making these mistakes and just get help from an expert first and foremost.
How Difficult Is It to Inspect a P2105 Code?
Inspection, as with diagnosis, can also be quite difficult. Do you know what indicates abnormal system voltages? Do you know how to check the wire harness? Do you have a diagnostic flowchart so you can make sure you’re checking out the most common issues before you check out less common issues? This is fairly uncommon for DIYers. While it is possible for you to gather this information over time, it’s not as easily accessible. An expert will have experience from past jobs and their training to help you fix the problem as easily as possible.
Need Additional Help with Your P2105 Code?
If you need extra help with the P2105 code, you should definitely get help from an expert. It’s common for this to be a difficult code for people to manage on their own, and an expert will by far be the most well-equipped person to help you determine what the problem is and how you can fix it. If you’re looking to fix the problem, you’re going to need to talk to a qualified professional.
To get started, you should first find an auto repair shop in your area. Not only will they be able to look for generic trouble codes you’re experiencing, but they’ll also be able to inspect and diagnose the core problem. It’s a great way to ensure that your code is actually taken care of, with no follow-up repairs necessary.
If there are any additional codes within your vehicle outside of code P2105, it’s also important that you know what those codes mean. The OBD-II database at KBB.com will help you determine the underlying cause related to these codes, so you’ll at least know what types of fixes you’ll probably need before you visit an auto repair shop.
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