Modern vehicles have an Anti-lock Braking System (ABS), which is a critical safety feature created to avoid wheel lock-up during emergency braking and, at the same time, still allow steering control.
However, when air gets into the ABS module, it can cause system efficiency to decrease, resulting in multiple braking problems.
Knowing the symptoms of air in ABS module can allow you to take immediate action and maintain proper, safe drive-ability for your vehicle.
Topic Summary
How Air Gets into the ABS System
If, in any way, air enters the ABS system, it will certainly reduce or even eliminate the brakes’ work. The following methods through which air could enter the ABS system are as follows:
Leaks in the Brake Lines
Brake lines can develop leaks from corrosion, damage, or general wear and tear over time. Any of these leaks can cause air to be sucked into the brake lines, with one or more bubbles finding their way to the ABS module.
Worn or Damaged Seals
Your ABS includes numerous seals and gaskets that are supposed to maintain a closed, pressurized environment. If these seals wear or are damaged, they can allow air to enter the system.
Brake Fluid Replacement
When the brake fluid is changed, if it doesn’t bleed correctly, you get air into that system and, eventually, a poor pedal feel. All air must be expelled this way, so it is very important to follow exact procedures and use proper tools.
Faulty Master Cylinder
The master cylinder creates hydraulic pressure in the braking system as it turns pedal pressure into hydraulic force. A failing master cylinder or one that simply wears out can allow air into the brake lines.
Brake System Repair
If the brake pads, calipers, or even the line need replacing, it is possible that air can enter your brand-new system if these repairs are not done correctly.
When done correctly, maintaining your vehicle on a regular basis and bleeding the brake system properly will reduce an ABS code related to air bubbles in the braking systems.
Symptoms of Air in ABS Module
Spongy Brake Pedal
A spongy or soft brake pedal Is one of the most common symptoms when you have air in the ABS module. The brake pedal should also feel firm and respond quickly.
When air is in the system, you may feel your brake pedal goes mushy or soft right before it engages. This is because air compresses much more easily than brake fluid, causing the braking system to lose adequate pressure offered by the master cylinder.
Increased Stopping Distance
Air can create an appreciable increase in braking distance at the ABS module. This becomes life-threatening in an emergency where fast stopping is a necessity.
When air is emitted, the braking system’s efficiency decreases, making it difficult to stop the car within the expected distance. A longer stopping time is one of the signs it may be time to get your braking system checked.
ABS Warning Light
If cars dashboard show ABS warning lights that warn us when a car is due for service. When the ABS module contains air, it can light up an ABS warning. This light usually means an issue somewhere in the ABS system, such as variable air in the module or other problems.
Therefore, if you see the ABS light on your dashboard lighting up one day, a competent mechanic should determine the problem as soon as possible.
Unusual Braking Noises
Unusual noises when braking is another symptom of air in the ABS module. When you apply the brakes, you can hear it hissing, clicking, or grinding.
Such noises may be caused by air trapped in a system, so ABS cannot work correctly. You need to check out those abnormal noises before it becomes a more costly ABS module repair.
Unpredictable Braking
Brake performance varies, indicating that the ABS module is getting air. Braking effectiveness may be inconsistent – sometimes the brakes seem good, and other times they feel weak.
It was not taught this ability, so depending on the situation, it often just rolls around to score an understeer effect in situations where everyone could do with some more reliable braking.
Brake Pedal Vibration
A Judder Or Vibration In The Brake Pedal During Light To Moderate Braking- If the driver encounters a noticeable judder or vibration in the brake pedal during light to moderate braking, it could indicate air pockets trapped inside an ABS module.
This symptom will usually also be joined by the ABS system becoming more active than usual, even during normal braking. That air can cause inconsistent pressure increases, feeling like vibrations in the pedals.
What to Do If You Suspect Air in the ABS Module
If you think there is a suspicion of air in the ABS module, do not neglect to rectify it. These are some of the steps you can follow:
Check The Brake Fluid Levels: Make sure you have enough brake oil. Insufficient brake fluid can allow air to enter the system.
Check for leaks: Inspect the brake booster unit, as it could be the source of a leak into your power braking system.
Bleed the Brakes: Bleeding is a means of removing air in brake lines and ABS modules. If there is, this should be powered by a professional mechanic to do so correctly.
Regular Maintenance: If the brake system is maintained regularly, air can not enter more in ABS related to it. Always adhere to your vehicle’s recommended brake bleeder maintenance and inspection schedule.
Preventive Measures to Avoid Air in the ABS System
Routine Maintenance: Regular maintenance is key to properly ensuring the condition and workings of your brake system, including the ABS module.
Proper Bleeding: Follow proper bleeding procedures when replacing brake fluid or servicing the brakes. Consult a professional if you have no idea how the process works.
Check for Leaks: Regularly check brake lines, hoses, and fittings for signs of leaks or damage. If you see any trouble, fix it so that no extra air enters the system.
Replace Worn Seals and Gaskets: Inspect the brake system to see that all seals and gaskets are in good condition. Replace damaged parts to maintain the pressure-tight sealing system.
Use Quality Brake Fluid: This is because you always want to make sure the brake fluid runs clean and contains no contaminants. It should also be of the highest quality (the recommended type specified by your vehicle manufacturer).
By using these precautions, you can protect your ABS system and make sure that brake performance is at its best.
FAQs on Symptoms of Air in the ABS System
What are the signs of air in my ABS Module?
Some classic symptoms of air in the ABS system are a soft brake pedal or spongy feel, longer stopping distances/piston travel versus pedal input (yes, that’s back-to-pedal ratio again), and the anti-lock braking light on your dash might come on as well while driving over rough transitions like driveways or speed bumps. Squeaks or grinding can be heard around areas where components flex. If any of these symptoms arise, your brake system must be checked.
How does air get into the ABS Module?
Air can get into the ABS system from incorrectly bleeding brake fluid after changes, leaks in pipes (piping), seals or gaskets worn out, and damaged master cylinders while repairing a brake system if it is not done properly. You can avoid air entering the system by performing proper repair and regular maintenance.
What should I do if I suspect air in my ABS system?
When you think there is air in your ABS system, first check for a good (not low) brake fluid level and then inspect where the leak can originate. However, if you have low brake fluid levels or can locate a leak, then it will be best to get the brakes checked by an experienced professional before starting bleeding and flushing out air. That prompts the conclusion that more harm can be avoided by getting it settled instantly, and your braking system would work appropriately.
Conclusion
Air within the ABS module can seriously affect your daily commute and driving experience. Identifying the symptoms — spongy brake pedal, longer stopping distance, ABS warning light on, strange noises when you hit the brakes, and/or inconsistent braking performance or experiencing a vibration in your pedals are some of them to mention— can help take steps towards resolving this concern.
You can visit us for routine maintenance and get problems with your brakes fixed immediately so you know that your ABS system is working properly on the road.