2018 Honda Accord Dashboard Lights Suddenly All On

Your Honda Accord’s battery or alternator may be failing if all of the dashboard lights begin flashing at once. This is a warning to the driver to take action before it’s too late to prevent damage to the engine and other critical components. 

The Honda dashboard lights use a color-coded system to convey the severity of the issue: blue or green means there is no problem, orange or yellow means there may be an issue and it should be checked soon, and red means there is a severe problem, and the vehicle should be stopped and a Honda dealer contacted for assistance. So in this article we will talk about reasons why 2018 Honda Accord Dashboard Lights Suddenly All On.

What Are The Various Honda Accord Dashboard Warning Lights?

A Honda vehicle’s dashboard displays a variety of warning lights, each with its own specific meaning and indication to the driver. These lights can be caused by various factors and may require different methods to fix. Examples of warning lights and their explanations, causes, and solutions are provided.

  • The Temperature Warning Light
  • The Engine Oil Pressure Warning Light
  • The Battery Charging Warning Light
  • The Tyre Pressure Warning Light
  • The Check Engine Warning Light
  • The Brake System Warning Light

The Temperature Warning Light

This warning light on the dashboard of a Honda vehicle is typically represented by a thermometer or temperature gauge icon. It is an indication that the engine is overheating and is likely caused by prolonged use of the vehicle. 

It could also be caused by a malfunctioning coolant system, low coolant levels, or a malfunctioning thermostat. If this light comes on, you need to take immediate action to protect your engine.


  • The formation of bubbles in the coolant system can impede the flow of coolant to the engine, causing the radiator to lose coolant and activate the warning light
  • Coolants that are of poor quality may freeze in the cooling system during cold temperatures, causing blockages
  • Debris and foreign materials clogging the radiator can restrict the flow of liquid, leading to the warning light

Steps to Fix:

  • Bring the vehicle to a stop and park it on the shoulder of the road.
  • Turn off the engine and open the hood to allow it to cool down, but do not open the radiator cap while the engine is still hot
  • Determine the cause of the engine overheating
  • Once the engine has cooled down, carefully check the antifreeze level and for leaks by opening the radiator cap
  • If the above steps do not resolve the issue, take the vehicle to a mechanic for further inspection and repair

The Engine Oil Pressure Warning Light

This warning light is an indication of low oil pressure, which can be caused by a lack of lubrication in the engine due to insufficient fluid circulation from the oil pump. It could be due to low oil levels, a clogged oil filter, or a broken oil pump. All three of these issues could be to blame.

This warning light should be taken seriously, as it can lead to severe engine damage if not addressed promptly


  • The engine may not have enough oil due to leaks or evaporation
  • Lubrication can’t work right if the oil filter is clogged
  • The warning light can be turned on by a broken sensor

Steps to fix:

  • Verify the oil level of your Honda vehicle
  • If the oil level is low, fill the engine with oil and change the oil
  • Make sure to keep up with regular oil changes, following the recommended intervals for synthetic and conventional oils
  • If the above steps do not solve the problem, seek assistance from a mechanic or have the vehicle serviced

The Battery Charging Warning Light

The Battery Charging Warning Light, represented by a math Lego symbol, indicates a problem with the battery charging system.


  • Inspect the alternator belt for any damage or wear.
  • Check for any corrosion on the battery terminals that may impede the flow of electricity and affect the alternator’s performance
  • Make sure the battery cables are connected well and the batteries are charged
  • If the above steps do not solve the problem, seek assistance from a mechanic or have the vehicle serviced

Steps to fix:

  • Check the battery when the warning light appears on the dashboard, as it powers the radio, headlights, and ignition system
  • Bring your Honda vehicle to a professional for battery inspection and maintenance

The Tyre Pressure Warning Light

This indicator light signals that one or more of the tires on the vehicle may have low air pressure and may be under-inflated.


  • Low tire pressure caused by a leak
  • Tires that are overinflated lead to wear and tear

Steps to fix:

  • Inspect the tire pressure using a gauge
  • Regularly check the condition of the tires to prevent excessive wear

The Check Engine Warning Light

This warning light indicates that there is a problem with either one of the vehicle’s systems or all of them together.


  • A malfunction in the ignition system can lead to improper burning of fuel.
  • A mass airflow sensor that is not properly installed can allow foreign particles to enter the engine and cause issues.
  • A loose diesel filter cap can cause air to leak in or out of the tank.
  • A blockage in the diesel particulate filter can also cause problems.
  • If you think your car has any of these problems, it’s best to take it to a mechanic who can figure out what’s wrong and fix it.

Steps to fix:

  • Determine the source of the warning signal
  • Inspect your Honda’s dashboard indicators and warning lights to ensure proper oil pressure and to avoid overheating.
  • Slow down and ensure the gas cap is securely fastened
  • If the above steps do not resolve the issue, take your Honda to a mechanic for servicing.

The Brake System Warning Light

A lack of brake fluid in the system can prevent the brakes from functioning properly in an emergency situation. This warning light indicates that the brake fluid level is low and needs to be addressed.


  • Malfunctioning control unit
  • Faulty Pump
  • Damaged solenoid
  • Damaged speed sensor
  • Insufficient fluid

Steps to fix:

  • Determine the cause of the warning light
  • Take your vehicle to the mechanic to check
  • Check the bulb and replace the burned-out dashboard if the lights don’t clear after turning on the ignition.

Why Are All My Dashboard Lights On in Honda Accord?

When all of the dashboard lights in your Honda Accord illuminate at the same time, it usually indicates a problem with the alternator or charging system. This situation frequently occurs when there is no alternator output, resulting in low voltage, which can cause unusual electrical problems. It is recommended that the alternator be tested when the battery is replaced to ensure that it is working properly.

What Is the Computer Problem with the 2018 Honda Accord?

The 2018 Honda Accord had a number of issues, including faulty cameras and electrical issues. A recall was issued in late 2018 due to a failure of the rear view image display. Later, in late 2020, another recall was issued due to software malfunctions in the body control module. 

These two recalls affected approximately one million Honda Accord owners, prompting notifications to be sent out to address the issues, the majority of which were related to the Accord model.

How Do You Know If Your Battery Is Bad in a 2018 Honda Accord?

Observing specific signs can help you determine whether your 2018 Honda Accord’s battery is in trouble. If the battery is old and nearing the end of its life, it may need to be replaced. Slow engine cranking or taking longer to start the car is another sign of a possible battery problem. 

If you frequently have to jump-start your car, this is an indication of a faulty battery. Furthermore, an illuminated check engine light can sometimes indicate a battery problem, so have it checked and tested if you notice any of these symptoms. Regular maintenance and periodic battery checks can help prevent unexpected problems with the battery in your Honda Accord.

Final Words

The various Honda Accord dashboard warning lights include the temperature warning light, engine oil pressure warning light, battery charging warning light, tire pressure warning light, check engine warning light, and brake system warning light. 

Each light represents a different issue and requires different steps to fix. If any of the warning lights appear on the dashboard, it is important to take immediate action to prevent engine damage.

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Ammar Masoud

I have had a long and fulfilling career in the automotive industry, primarily with Honda and Acura. With 15 years of experience as a Honda service technician, I became highly skilled in repair and maintenance, gaining a deep understanding of these vehicles. After many years in the automotive field, I decided to embark on a second career in industrial manufacturing. It was a significant change, but I found that the skills I had honed in the automotive industry were incredibly valuable in my new role. In my current position in industrial manufacturing, the demand for quality workmanship and meticulous attention to detail is paramount. Fortunately, these are traits that I have cultivated throughout my years in the automotive industry. I take pride in applying these skills to meet the high standards expected in the manufacturing sector.