61-1 Honda Code – Battery Voltage Malfunction [Causes & How to Fix]

The 61-1 code is a diagnostic trouble code (DTC) that can appear on Honda vehicles.

In this article, we’ll explain exactly what the 61-1 code means, the common causes of the issue, and the steps you can take to fix it.

Whether you’re a Honda owner or a mechanic, understanding this code and how to fix it can save you time, money, and hassle in the long run.

61-1 Honda Code - Battery Voltage Malfunction

Meaning of the 61-1 Honda Code

The 61-1 Honda code typically indicates an issue with the battery voltage, either due to a problem with the battery itself or a problem with the alternator or charging system’s wiring.

To diagnose the issue, a mechanic should check the battery voltage with a multimeter, check the alternator output, and inspect the wiring harness for any signs of damage.

If a problem is found with the battery, alternator, or wiring, it should be addressed as soon as possible to prevent any further damage to the vehicle.

Common Symptoms of 61-1 Honda Code

Some of the common symptoms of the 62-1 Honda code include:

  • Difficulty starting the car or the vehicle turning over slowly
  • Electrical system issues such as interior lights not functioning properly, radio not working, or power windows not working
  • Dim or flickering headlights
  • A burning smell from the engine
  • The engine misfiring or running rough
  • An illuminated Check Engine light
  • Poor acceleration or loss of power
  • An unexplainable increase in fuel consumption
  • Unusual sounds coming from the engine
  • Poor air conditioning performance, or the AC not working at all

Possible Reasons for the 61-1 Honda Code

Causes of the 61-1 code can vary depending on the specific make and model of the vehicle. However, some common causes include the following:

1. Battery Issues

A faulty alternator, a loose battery cable connection, or a bad battery typically cause the 61-1 code. A faulty voltage regulator, or other wiring issues, could cause this code to appear.

2. Faulty Throttle Position Sensor (TPS)

The TPS is responsible for measuring the position of the throttle and sending this information to the engine control module.

If the TPS is not working properly, it can cause the engine to stall or have poor performance.

3. Mechanical Issues

Mechanical problems within the engine can also cause the 61-1 code. This can include a vacuum leak, clogged fuel injectors, or a malfunctioning idle air control valve.

4. Poor Maintenance

Neglecting regular maintenance, such as oil changes and air filter replacements, can lead to a buildup of dirt and debris in the engine, which can cause the 61-1 code to be triggered.

5. Extreme Driving Conditions

Driving in extreme temperatures, high altitudes, or heavy traffic can also contribute to the issue.

These conditions can cause additional wear and tear on the engine and its components, increasing the likelihood of the 61-1 code being triggered.

6. Electrical Issues

Sometimes the cause of the 61-1 code can be related to electrical problems such as damaged wiring or bad connections, which can affect the signals sent to the engine control module and cause the engine to stall or misfire.

While these are some of the most common causes of the 61-1 code, they could also be caused by other issues.

A proper diagnosis from a qualified mechanic or technician should be made to determine the specific cause of the problem.

Possible Solutions to the 61-1 Honda Code

1. Repairing Wiring between the Fuse and VSA Modulator Control Unit

If a faulty connection or damaged wiring causes the problem, it is important to diagnose and repair the issue as soon as possible.

This can prevent further damage to the system and ensure the proper function of the VSA modulator control unit.

2. Replacing a Bad Car Battery

A weak or failing battery can cause various issues, including problems with the VSA modulator control unit. Replacing the battery with a new one can help to restore proper function and resolve the 61-1 code.

3. Replacing a Bad Alternator

An alternator that is not functioning properly can cause issues with the battery and the VSA modulator control unit.

Replacing the alternator with a new one can help to resolve the problem and prevent further issues.

4. Cleaning Corrosion on the Battery Terminal

Corrosion on the battery terminals can cause poor connections and power supply issues. Cleaning off the corrosion can help to restore proper function and prevent further damage to the system.

5. Clearing or Deleting the Code on the Module

Sometimes, the 61-1 code may be a false reading or a stored code from a previous issue. Clearing or deleting the code can restore proper function and prevent further errors.

6. Substituting or Updating the VSA Modulator Control Unit

If a faulty VSA modulator control unit causes the problem, it may be necessary to replace or update the unit to restore proper function and resolve the 61-1 code.

This should be done by a professional mechanic, as it can be a complex task.

It’s important to note that these are general solutions, and it’s always recommended to consult a professional mechanic to properly diagnose the issue and provide the best course of action.

What Can Cause a Battery to Lose Voltage?

1. Age

As the battery ages, its ability to hold a charge decreases, over time, the electrolyte inside the battery will lose strength, and the plates will corrode, which can lead to a loss of voltage.

2. Overcharging

If a battery is overcharged, it can cause damage to the internal components and lead to a voltage loss.

3. Parasitic Load

A parasitic load is a small electrical current drawn from the battery even when the car is turned off.

This can happen due to a malfunctioning component, such as a radio or clock, which can drain the battery and cause voltage loss.

4. Temperature

Extreme hot or cold temperatures can affect a battery’s ability to hold a charge. Cold temperatures can cause the electrolyte to thicken, making it harder for the battery to produce power.

Hot temperatures can cause the electrolyte to evaporate, leading to a voltage loss.

5. Lack of Use

If a battery is not used for an extended period, the electrolyte inside the battery can dry out, leading to a voltage loss.

6. Short Circuit

A short circuit is an electrical problem that occurs when a hot wire comes into contact with a grounded surface or another wire, and this can cause a battery to lose voltage.

7. Corrosion of Terminals

The battery’s terminals can corrode over time, leading to a loss of voltage or power.

8. Faulty Alternator

If the alternator is not working properly, it can cause the battery to lose voltage as it is not getting recharged while the engine is running.

Read: Squeaky Brake Pedal


In conclusion, the 61-1 code is a diagnostic trouble code that can indicate a problem with the throttle control system on Honda vehicles.

The causes of this issue can range from faulty sensors to poor maintenance. However, by understanding the meaning of the code, identifying the root cause of the problem, and implementing the appropriate solution, you can resolve the issue and get your vehicle running smoothly again.

Regular maintenance and avoiding harsh driving conditions can also help prevent this problem from reoccurring.

If the problem persists, it is best to seek professional help to ensure proper diagnosis and repair.