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Spongy Brake Pedal and Long Travel on 2022 Ram 1500

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Mike T. · rep 0 · May 25, 4:16 AM · 1 replies · solved · Question

Vehicle: 2022 Dodge Ram 1500 Big Horn

Hi folks,

I've noticed lately that the brake pedal on my 2022 Ram 1500 (Big Horn trim) feels really spongy, and I have to push it almost to the floor before the truck starts to slow down effectively. It's a gradual change, not sudden, but it's definitely gotten worse.

There are no warning lights on the dash, and I haven't seen any fluid leaks under the truck. What could cause this kind of soft pedal feel and excessive travel? Could it be air in the lines, or something more serious with the master cylinder? Any ideas specific to these Ram trucks?

Thanks for your help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:16 AM

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ClearTheCode admin answer:

A spongy brake pedal with excessive travel on your 2022 Ram 1500, especially without warning lights or visible leaks, can be concerning. This symptom usually points to a problem with hydraulic pressure within the braking system. Here are the most common causes:

  1. Air in the Brake Lines: This is the most frequent cause of a spongy pedal. Air is compressible, unlike brake fluid, so it absorbs pedal pressure instead of transmitting it to the calipers. Air can get into the system after a component replacement, if the fluid level dropped too low, or through a minor leak.
  2. Low Brake Fluid Level: Although you mentioned no warning lights, a low fluid level (even if not critically low to trigger a light) can introduce air or reduce system pressure. Check your master cylinder reservoir.
  3. Failing Master Cylinder: The master cylinder is responsible for generating hydraulic pressure. If the internal seals are worn, fluid can bypass them, leading to a loss of pressure and a soft, sinking pedal. This often happens without external leaks.
  4. Brake Fluid Contamination or Degradation: Old or contaminated brake fluid can boil at lower temperatures, creating vapor (a form of air) in the lines, or simply become less effective at transmitting pressure.
  5. Caliper Issues: A stuck caliper piston or a small internal leak within a caliper could potentially cause a spongy feel, though this often comes with other symptoms like uneven braking or a pull.
  6. Vacuum Booster Problem (Less Likely for Spongy Pedal): While a failing brake booster typically results in a hard pedal, an internal leak in the booster could theoretically affect pedal feel, but it's not the primary cause of sponginess.

When to see a shop:

  • Immediately: A spongy brake pedal is a significant safety concern. Your stopping distance will be increased, and emergency braking effectiveness will be severely compromised. Do not delay in getting this checked.
  • Have a qualified mechanic inspect your entire brake system. They will check the brake fluid level and condition, inspect for any leaks, and most importantly, perform a thorough bleeding of the brake lines. If bleeding doesn't resolve the issue, they will then diagnose the master cylinder or other hydraulic components. Early diagnosis can prevent more serious and costly repairs, and most importantly, ensure your safety.
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