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2020 Pacifica: Soft Brake Pedal and Spongy Feel

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Sarah K. · rep 0 · May 22, 5:52 AM · 1 replies · solved · Question

Vehicle: 2020 Chrysler Pacifica Touring L

Hey everyone,

I'm experiencing a really concerning issue with my 2020 Chrysler Pacifica Touring L. Lately, the brake pedal has felt incredibly soft and spongy, almost like I have to push it much further down to get any real braking power. It's definitely not as firm as it used to be.

I've noticed that sometimes it feels like the stopping distance is a bit longer too, which is making me pretty nervous, especially with kids in the car. There are no warning lights on the dash, and I haven't heard any strange noises like grinding or squealing.

I checked the brake fluid reservoir, and it seems to be at the correct level. No visible leaks around the calipers or lines that I can spot. Has anyone else with a Pacifica, especially around this model year, experienced anything similar? What could be causing this? Any advice on what to check next before I take it to a shop?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:52 AM

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ClearTheCode admin answer:

A soft or spongy brake pedal in your 2020 Chrysler Pacifica Touring L is a significant safety concern and should be addressed promptly. This symptom typically indicates an issue within the hydraulic braking system.

Here are the common causes and diagnostic steps:

  1. Air in the Brake Lines: This is the most frequent cause. Air is compressible, unlike brake fluid, leading to a spongy pedal feel. This can happen after a brake fluid flush, caliper replacement, or if the fluid level dropped too low at some point, allowing air to enter the system.

    • Action: The system needs to be properly bled to remove all air. This often requires a pressure bleeder or a two-person manual bleeding process, starting with the wheel furthest from the master cylinder.

  2. Failing Master Cylinder: The master cylinder is responsible for pressurizing the brake fluid. If its internal seals are worn, fluid can bypass the piston, leading to a loss of pressure and a soft pedal, sometimes even a pedal that slowly sinks to the floor when held.

    • Action: A failing master cylinder typically requires replacement. A diagnostic test involves checking for internal leaks.

  3. Brake Fluid Contamination or Degradation: Old or contaminated brake fluid can boil at lower temperatures, creating vapor pockets (which act like air) and leading to a spongy pedal.

    • Action: A complete brake fluid flush and replacement with the manufacturer-recommended fluid is necessary.

  4. Faulty Brake Caliper/Wheel Cylinder: While less common for a general soft pedal without leaks, a stuck or leaking caliper piston can sometimes contribute to an inconsistent pedal feel.

    • Action: Inspect all calipers for leaks or uneven pad wear.

  5. ABS Module Issues: In rare cases, an internal fault within the ABS module can affect brake pedal feel. However, this is usually accompanied by ABS warning lights or specific diagnostic trouble codes (DTCs).

    • Action: Scan for OBD-II codes, especially C-codes related to the braking system. Common codes might include C0034 (Left Front Wheel Speed Sensor Circuit), C0040 (Right Front Wheel Speed Sensor Circuit), or C0051 (Brake Pressure Sensor Circuit).

When to See a Shop: Given that braking is a critical safety system, if you're not experienced with hydraulic brake system diagnostics and repairs, it's highly recommended to take your Pacifica to a qualified mechanic immediately. They have the specialized tools (like pressure bleeders and diagnostic scanners) and expertise to accurately diagnose the root cause and perform the necessary repairs safely. Do not delay this repair, as compromised braking can lead to dangerous situations.

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