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Harley Code P2107: Understanding and Fixing the Throttle Actuator Control Module Processor Error

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Chase Manhattan

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Owner and Editor at The Wrench Network

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Hey y’all, it’s Chase Manhattan! I’m a life-long automotive and motorcycle enthusiast with a knack for diagnostics that I hope to share with you! Lately, I’ve been running my own motorcycle rental business, which you can read about here, and it has been a great experience that has allowed me to own numerous bikes that I probably couldn’t justify otherwise. Plus, it’s been a great way to experience new places while on vacation. If you haven’t heard of them before, I definitely recommend checking out the Riders-Share platform if you get the itch to ride while away from home, or if you want to explore a cheaper way to own and ride motorcycles!

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If you own a Harley-Davidson motorcycle, you may have encountered the P2107 code at some point. This code is related to the Throttle Actuator Control Module (TACM) and is usually accompanied by a “check engine” light on your dashboard. The P2107 code is set when the ETC control area of the Powertrain Control Module (PCM) fails a test. This fault code could be the result of an internal error within the TACM or a malfunctioning throttle actuator motor.

When your Harley-Davidson motorcycle displays the P2107 code, it’s important to take it seriously and have it checked by a professional. Continuing to ride your motorcycle with this code present could cause further damage to your engine and other components. If you’re not comfortable diagnosing and repairing the issue yourself, it’s best to take your motorcycle to a Harley-Davidson dealer or a qualified mechanic who has experience working on Harley-Davidson motorcycles.

Fortunately, the P2107 code can usually be fixed relatively easily. Fixing the issue may involve replacing the throttle actuator motor or repairing the TACM, depending on the root cause of the problem. Once the issue has been resolved, the “check engine” light should turn off, and your motorcycle should operate as usual.

Understanding Code P2107

If you own a Harley-Davidson motorcycle and your check engine light is on, there’s a chance that you might have a P2107 code. This code indicates a malfunction in the Throttle Actuator Control Module Processor. In this section, we’ll take a closer look at what this code means, its technical description, and the symptoms you might experience.

Technical Description

The Throttle Actuator Control Module Processor is responsible for controlling the throttle body. When the engine control unit (ECU) detects a malfunction in this module, it sets a P2107 code. This code is a general OBD2 trouble code that indicates a malfunction within the throttle control module processor. The throttle actuator motor fails to operate, and this is detected by the ECU.

Symptoms of P2107

If you have a P2107 code, you might experience reduced engine power, engine stalling, and the check engine light being on. The throttle might not respond properly, and you might have trouble accelerating. In some cases, the engine might not start at all.

If you’re experiencing any of these symptoms, it’s important to take your motorcycle to a qualified mechanic as soon as possible. They’ll be able to diagnose the problem and fix it before it causes any further damage.

In conclusion, a P2107 code can be a serious issue if left untreated. It’s important to take your motorcycle to a qualified mechanic as soon as possible if you’re experiencing any of the symptoms associated with this code. With the right diagnosis and repair, you’ll be back on the road in no time.

Troubleshooting the P2107 Code

If you have a Harley Davidson and you’re experiencing the P2107 code, it’s important to troubleshoot the issue as soon as possible. Here are some steps you can take to diagnose the problem:

Diagnostic Trouble Code

The P2107 code is a diagnostic trouble code that indicates a malfunction in the Throttle Actuator Control Module Processor. This means the car’s computer has detected a problem within the throttle control area of the Powertrain Control Module (PCM) and has set the code. When you see this code, it’s important to take immediate action to diagnose and repair the issue.

Possible Causes

There are several possible causes of the P2107 code, including:

To troubleshoot the issue, start by checking the electrical connections and wiring harnesses for any signs of damage or corrosion. If everything looks good, you should move on to testing the Throttle Position Sensor (TPS) with a multimeter to ensure it’s functioning properly. If the TPS is faulty, it will need to be replaced.

If the TPS is fine, you should check the Throttle Body for any signs of damage or wear. If the Throttle Body is defective, it will need to be replaced as well.

Overall, troubleshooting the P2107 code requires a thorough diagnosis of the throttle control area of the Powertrain Control Module (PCM). By following these steps, you can diagnose and repair the issue quickly and effectively.

Throttle Actuator Control System

The Throttle Actuator Control System is a crucial part of your Harley’s engine management system. It is responsible for controlling the throttle position and regulating the amount of air entering the engine. The system is composed of several components, including the Throttle Actuator Control (TAC), Throttle Position Sensor (TPS), Electronic Throttle Body (ETB) and Throttle Actuator Control Module (TACM).

Throttle Position

The Throttle Position Sensor (TPS) is responsible for monitoring the position of the throttle plate. It sends this information to the Electronic Control Module (ECM), which uses it to determine the appropriate fuel and air mixture for the engine. The TPS is a potentiometer that varies its resistance based on the position of the throttle plate. The ECM uses this resistance to determine the position of the throttle plate.

Electronic Throttle Body

The Electronic Throttle Body (ETB) is the component responsible for controlling the amount of air entering the engine. It is composed of a throttle plate and an electric motor that controls its position. The ECM sends a signal to the motor, which moves the throttle plate to the desired position. The position of the throttle plate is monitored by the TPS and sent back to the ECM.

The Throttle Actuator Control System integrates the TAC, TPS, ETB, and TACM to ensure that the engine receives the appropriate amount of air and fuel. The TACM is responsible for controlling the TAC and monitoring its performance. If the TACM detects a fault in the TAC, it will trigger a Diagnostic Trouble Code (DTC) such as P2107.

In conclusion, the Throttle Actuator Control System is a critical component of your Harley’s engine management system. It is responsible for regulating the amount of air entering the engine and ensuring that the engine receives the appropriate amount of fuel. Understanding how the system works can help you diagnose and fix issues such as the P2107 code.

Diagnostic Process

When you encounter the P2107 code on your Harley, it’s important to diagnose the problem correctly to avoid wasting time and money on unnecessary repairs. Here are the steps you can take to diagnose and repair the problem.

Visual Inspection

The first step in diagnosing the P2107 code is to perform a visual inspection of the throttle body and all related components. Check for any signs of damage or wear, including loose or damaged wiring, corroded connectors, and damaged or broken vacuum lines. If you notice any problems during the visual inspection, repair or replace the damaged components as necessary.

Multimeter Testing

If the visual inspection doesn’t reveal any obvious problems, the next step is to perform multimeter testing to check the resistance of the throttle position sensor (TPS) and other related components. Using a multimeter, you can check the resistance of the TPS and compare it to the manufacturer’s specifications to determine if it’s within the acceptable range.

To perform the multimeter testing, follow these steps:

  1. Disconnect the TPS from the wiring harness.
  2. Set the multimeter to the ohms setting.
  3. Connect the multimeter leads to the TPS terminals.
  4. Slowly rotate the throttle and observe the multimeter readings.
  5. Compare the readings to the manufacturer’s specifications.

If the multimeter readings are outside the acceptable range, replace the TPS or other related components as necessary.

By following these diagnostic steps, you can diagnose and repair the P2107 code on your Harley quickly and effectively. If you’re not comfortable performing these diagnostic steps yourself, it’s always a good idea to take your bike to a qualified mechanic who can diagnose and repair the problem for you.

Repair and Maintenance

Replacing Throttle Body

If you have determined that the throttle body is the culprit behind the P2107 code, you may need to replace it. Replacing the throttle body is a relatively straightforward process that can be done with basic tools. However, if you are not experienced with auto repair, it may be best to have a professional mechanic perform the replacement.

To replace the throttle body, you will need to:

  1. Disconnect the battery to prevent any electrical damage.
  2. Remove the air intake hose from the throttle body.
  3. Disconnect the throttle position sensor and any other electrical connections.
  4. Remove the bolts that hold the throttle body in place.
  5. Replace the old throttle body with a new one.
  6. Reconnect all electrical connections and the air intake hose.
  7. Reconnect the battery.

Repair Difficulty

The difficulty of repairing the P2107 code will depend on the root cause of the problem. If the issue is with the throttle body, replacing it can be a relatively easy task. However, if the problem is with the wiring or the throttle position sensor, troubleshooting and repairing the issue can be more difficult.

If you are not experienced with auto repair, it may be best to have a professional mechanic diagnose and repair the issue. They will have the necessary tools and expertise to quickly and accurately diagnose the problem and get your Harley back on the road.

Overall, repairing the P2107 code is an important task that should not be ignored. If left unaddressed, it can lead to further damage and potentially unsafe driving conditions.

Commonly Related Trouble Codes

If you’re experiencing Harley code P2107, there are several other trouble codes that you may encounter. Here are some of the most commonly related trouble codes:

P2108 and P2112

Harley code P2108 is another trouble code related to the throttle actuator control module (TACM). It indicates a malfunction within the TACM processor, specifically that the throttle actuator motor has failed to operate. This code is often accompanied by P2112, which indicates that the throttle actuator control system is stuck closed.

P2111 and P2118

Harley codes P2111 and P2118 are also related to the throttle actuator control system. P2111 indicates that the throttle actuator control system is stuck open, while P2118 indicates that the throttle actuator control system is stuck closed.

It’s important to note that while these trouble codes are related to P2107, they may have different causes and require different solutions. If you’re experiencing any of these trouble codes, it’s best to consult a professional mechanic to diagnose and fix the issue.

Remember, trouble codes are simply a starting point for diagnosing issues with your Harley. They provide a general idea of where the problem may lie, but they don’t always indicate the exact cause of the issue. It’s always best to have a professional mechanic diagnose and fix any issues with your motorcycle.

Preventative Measures

If you are experiencing the P2107 code on your Harley Davidson, there are several preventative measures you can take to reduce the risk of encountering this issue in the future. In this section, we will cover two main areas to focus on: regular maintenance and technical service bulletins.

Regular Maintenance

One of the most important preventative measures you can take is to follow the manufacturer’s recommended maintenance schedule. This includes cleaning or replacing the throttle body as needed. Regular maintenance can help prevent issues with the throttle control module and other electrical systems.

Another important aspect of regular maintenance is keeping an eye on warning lights on your dashboard. If you notice the service engine soon warning light or check engine light come on, it is important to address the issue as soon as possible. Ignoring these warning lights can lead to more serious problems down the line.

Technical Service Bulletins

Harley Davidson releases technical service bulletins (TSBs) to address common issues that may arise with their motorcycles. It is important to stay up to date with these bulletins and address any issues they may address.

For example, there may be a TSB related to the throttle control module that can help prevent the P2107 code from appearing. By staying informed and addressing these issues as soon as possible, you can reduce the risk of encountering problems with your Harley Davidson in the future.

Overall, taking these preventative measures can help keep your motorcycle running smoothly and prevent issues like the P2107 code from occurring. By staying informed and staying on top of regular maintenance, you can enjoy your Harley Davidson for years to come.

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