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Harley Code B1210: What It Means and How to Fix It

by

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 a B1210 error code. This code refers to a fuel level sender that has been shorted low or open. When this code is triggered, the fuel gauge may not work correctly, and the low fuel warning light may flash even if there is fuel in the tank.

To diagnose and fix this issue, you may need to take your motorcycle to a Harley Davidson dealership or a qualified mechanic. They will use diagnostic tools to determine the cause of the error code and then repair or replace the faulty parts. In some cases, the issue may be caused by a loose or damaged wire, which can be a relatively easy fix.

It is important to address the B1210 error code promptly to ensure that your fuel gauge is accurate and that you don’t run out of gas unexpectedly. If you are experiencing this issue, don’t hesitate to seek professional help to get your motorcycle back on the road.

Overview of Harley Code B1210

If you own a Harley-Davidson motorcycle and are experiencing issues with your fuel gauge, you may have encountered diagnostic trouble code (DTC) B1210. This code indicates that there is a problem with the fuel level sender, which may be shorted low or open. In this section, we will provide an overview of DTC B1210, including its causes and symptoms.

Understanding DTC B1210

DTC B1210 is a diagnostic trouble code that indicates an issue with the fuel level sender in your Harley-Davidson motorcycle. The fuel level sender is responsible for measuring the amount of fuel in your motorcycle’s tank and sending that information to the fuel gauge. When the fuel level sender is shorted low or open, it can cause the fuel gauge to malfunction and display inaccurate readings.

Common Causes and Symptoms

There are several common causes of DTC B1210 in Harley-Davidson motorcycles. These include:

  • A faulty fuel level sender
  • Damaged wiring or connectors in the fuel level sender circuit
  • Corrosion or other damage to the fuel level sender or fuel tank

Symptoms of DTC B1210 may include:

  • Inaccurate fuel gauge readings
  • Low fuel warning light flashing
  • Fuel gauge showing empty even when the tank is full

If you are experiencing any of these symptoms, it is important to have your motorcycle diagnosed by a qualified technician. They can use specialized diagnostic tools to determine the exact cause of the problem and recommend the appropriate repairs.

In conclusion, DTC B1210 can be a frustrating issue for Harley-Davidson motorcycle owners. However, by understanding its causes and symptoms, you can take steps to address the problem and get back on the road with confidence.

Diagnostic Process

If you are experiencing issues with your Harley-Davidson motorcycle, one of the first things you should do is check for any diagnostic trouble codes (DTCs). One common DTC that you may encounter is code B1210, which indicates a fuel level sender shorted low or open circuit.

Initial Checks

Before using any diagnostic tools, there are a few initial checks you can perform to try and diagnose the issue. First, check the fuel gauge to see if it is reading accurately. If the gauge is not reading properly, it could be a sign of a faulty fuel level sender.

Next, check the wiring and connections to the fuel level sender. Make sure that all connections are secure and that there are no signs of damage or corrosion.

If these initial checks do not reveal the source of the issue, it may be necessary to use diagnostic tools to further diagnose the problem.

Using Diagnostic Tools

To diagnose code B1210, you will need a diagnostic tool that is compatible with your Harley-Davidson motorcycle. These tools can help you read and clear DTCs, as well as provide additional diagnostic information.

When using a diagnostic tool, follow the manufacturer’s instructions carefully. Connect the tool to your motorcycle’s diagnostic port and follow the prompts to read any stored DTCs.

If code B1210 is present, the diagnostic tool may provide additional information about the source of the issue. This could include information about the fuel level sender circuit, such as whether it is shorted low or open.

Once you have identified the source of the issue, you can begin the repair process. This may involve replacing the fuel level sender or repairing any damaged wiring or connections.

In summary, if you encounter code B1210 on your Harley-Davidson motorcycle, start by performing initial checks to diagnose the issue. If these checks do not reveal the source of the problem, use a diagnostic tool to further diagnose the issue and begin the repair process.

Electrical Components Involved

When it comes to understanding the B1210 code in your Harley, it is important to know the electrical components involved in the system. This can help you diagnose and fix the issue more effectively. In this section, we will discuss the battery and connections, ignition system, and body control module (BCM).

Battery and Connections

The battery and its connections are crucial components in your Harley’s electrical system. A weak or faulty battery can cause issues with the fuel level sender, which can trigger the B1210 code. Make sure to check the battery’s voltage and connections before proceeding with any other diagnostic steps.

Ignition System

The ignition system is responsible for starting and powering your Harley. The system includes the starter, spark plugs, and ignition coil, among other components. A faulty ignition system can cause the B1210 code to appear. Check for any loose connections or damaged components in the ignition system.

Body Control Module (BCM)

The body control module (BCM) is a vital component in your Harley’s electrical system. It controls various functions, including the fuel level sender. A malfunctioning BCM can cause the B1210 code to appear. Check the BCM’s connections and wiring for any signs of wear or damage.

In conclusion, understanding the electrical components involved in the B1210 code can help you diagnose and fix the issue more effectively. Make sure to check the battery and connections, ignition system, and body control module (BCM) for any issues. If you still can’t find the problem, it may be best to take your Harley to a professional mechanic for further diagnosis and repair.

Troubleshooting and Repair

If you are experiencing Harley code B1210, it means that the fuel level sender is either shorted low or open. This can cause issues with your fuel gauge, which can be frustrating and potentially dangerous. However, with some troubleshooting and repair, you can fix the issue and get back to riding your Harley with confidence.

Repair Guidelines

When it comes to repairing Harley code B1210, there are a few guidelines you should follow to ensure that you are doing it correctly. First, you should check all of the wiring and connections to make sure that they are secure and not damaged. If you find any issues with the wiring or connections, you should fix them before moving on to the next step.

Next, you should check the fuel level sender itself to see if it is faulty. You can do this by using a multimeter to test the resistance of the sender. If the resistance is outside of the manufacturer’s specifications, then you will need to replace the sender.

Replacing Faulty Parts

If you have determined that the fuel level sender is faulty, then you will need to replace it. This is a relatively simple process that can be done with basic tools. First, you should remove the fuel tank from your Harley to gain access to the sender. Once you have removed the tank, you can disconnect the wiring and remove the sender from the tank.

Next, you should install the new sender in the tank and reconnect the wiring. Once you have done this, you can reattach the fuel tank to your Harley and test the fuel gauge to make sure that it is working properly.

In conclusion, Harley code B1210 can be a frustrating issue to deal with, but with some troubleshooting and repair, you can fix the issue and get back to riding your Harley with confidence. By following the repair guidelines and replacing any faulty parts, you can ensure that your fuel gauge is working properly and that you are safe on the road.

Preventive Maintenance

As a Harley owner, you know the importance of regular maintenance to keep your motorcycle running smoothly. One of the essential aspects of preventive maintenance is inspecting your motorcycle for any potential issues. Regular inspections can help you identify problems early on and avoid costly repairs down the road.

Regular Inspection

When it comes to Harley code B1210, a regular inspection of your fuel level sender is crucial. This code indicates that the fuel level sender is shorted low or open, which can cause issues with your fuel gauge. Inspect the fuel level sender regularly and ensure that it is properly connected. If you notice any signs of damage or wear, replace it immediately to prevent further damage.

Additionally, pay attention to any warning signs on your dashboard. If you see the low fuel warning light or notice that your fuel gauge is not working correctly, it could be a sign of a problem with the fuel level sender.

Maintenance Tips

To prevent Harley code B1210 and other issues, follow these maintenance tips:

  • Regularly inspect your fuel level sender and fuel gauge for any signs of damage or wear.
  • Ensure that the fuel level sender is properly connected.
  • If you notice any warning signs on your dashboard, investigate the issue immediately.
  • Regularly clean and maintain your motorcycle to prevent issues with the fuel system.

By following these maintenance tips and regularly inspecting your motorcycle, you can prevent Harley code B1210 and other issues from occurring.

Understanding Your Harley’s Electronics

As a Harley owner, it is important to understand the electronics in your motorcycle. This knowledge will help you diagnose and fix issues that may arise, such as the B1210 code.

Electronic Control Unit (ECU)

The Electronic Control Unit (ECU) is the brain of your Harley’s electronics. It receives input from various sensors and modules, processes the data, and sends output signals to control the various systems in your motorcycle. The ECU is responsible for controlling the fuel injection system, ignition timing, and other key systems.

Sensor and Module Functions

Sensors and modules are important components of your Harley’s electronics. They work together to provide the ECU with the information it needs to make decisions. Some of the key sensors and modules in your motorcycle include:

  • Fuel level sender: This sensor measures the amount of fuel in your gas tank and sends the information to the ECU. If the fuel level sender is faulty, it can trigger the B1210 code.

  • WIM module: The WIM module is responsible for detecting the presence of the key fob and sending a signal to the ECU. If the WIM module is faulty, it can cause issues with starting your motorcycle.

  • Audio amplifier: The audio amplifier is responsible for amplifying the sound from your Harley’s speakers. If the audio amplifier is faulty, it can cause issues with your sound system.

By understanding the functions of these sensors and modules, you can better diagnose and fix issues with your motorcycle’s electronics.

Remember, if you ever encounter the B1210 code or any other issue with your Harley’s electronics, it’s important to consult your owner’s manual or a qualified mechanic for assistance.

Error Codes Related to B1210

When you encounter the B1210 error code, it is essential to know that it is related to fuel level sender issues or switch and button faults. Here are some other error codes that are related to B1210:

Fuel Level Sender Issues

  • B1211: Fuel level sender shorted high
  • B1212: Fuel level sender open/high
  • B1213: Fuel level sender open/low

When you see any of these error codes, it means that there is an issue with the fuel level sender. This device is responsible for measuring the amount of fuel in your Harley’s tank and sending the information to the fuel gauge. If it is shorted, open, or malfunctioning, the fuel gauge will not display the correct fuel level, and you may run out of gas unexpectedly.

Switch and Button Faults

  • B1300: Left turn output fault
  • B1301: Right turn output fault
  • B1302: Left turn switch fault
  • B1303: Right turn switch fault
  • B1304: Starter output fault
  • B1305: Starter switch fault
  • B1306: Ignition switch fault
  • B1309: Bank angle sensor output shorted low
  • B1310: Bank angle sensor output shorted high
  • B1312: Exhaust actuator position error
  • B1313: Exhaust actuator fault
  • B1314: Exhaust actuator feedback shorted low

These error codes indicate that there is a problem with the switches or buttons on your Harley. They control various functions, such as turning, starting, and ignition. If they are faulty, you may not be able to control these functions correctly, which can be dangerous while riding your motorcycle.

In conclusion, if you encounter any of the error codes related to B1210, it is essential to have your Harley checked by a professional mechanic. They will be able to diagnose the problem and fix it so that you can ride safely again.

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