The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2020 Eclipse Cross SEL: ABS and ASC lights on, spongy brake pedal

0

Mike T. · rep 0 · May 25, 4:08 AM · 1 replies · solved · Question

Vehicle: 2020 Mitsubishi Eclipse Cross SEL

Morning everyone, I've got an issue with my 2020 Mitsubishi Eclipse Cross SEL. The ABS and ASC (Active Stability Control) warning lights came on yesterday and haven't gone off. On top of that, the brake pedal feels a bit spongy, and I think the ABS might not be engaging correctly if I brake hard.

I haven't hit anything or driven through deep water. What could be causing both these lights to activate simultaneously? Are there common issues with the wheel speed sensors or the ABS module on these models? Any diagnostic steps I can try before heading to the dealer?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:08 AM

0

ClearTheCode admin answer:

When both the ABS (Anti-lock Braking System) and ASC (Active Stability Control) lights illuminate simultaneously, it indicates a fault within the vehicle's braking and stability control systems. The spongy brake pedal further suggests a hydraulic issue or a problem with the ABS modulator. This is a critical safety concern and should be addressed immediately.

Common Causes for ABS/ASC Lights and Spongy Pedal:

  1. Wheel Speed Sensors: These sensors monitor wheel rotation for the ABS and ASC systems. A faulty sensor, damaged wiring, or even a dirty sensor can cause these lights to activate. Common OBD codes include C0031 (Front Left Wheel Speed Sensor), C0034 (Front Right), C0037 (Rear Left), C003A (Rear Right).
  2. ABS Module Failure: The ABS control module can fail, leading to system errors. This is a more expensive repair but can cause widespread issues.
  3. Low Brake Fluid: While less likely to directly trigger ABS/ASC lights unless critically low, low fluid can cause a spongy pedal. Check your fluid reservoir.
  4. Air in the Brake Lines: If air enters the hydraulic system, it can cause a spongy pedal and potentially trigger system warnings if braking performance is severely compromised.
  5. Brake Master Cylinder: A failing master cylinder can cause a spongy pedal by not building sufficient pressure.

When to See a Shop:

Do not delay in getting your 2020 Eclipse Cross SEL inspected. Driving with compromised ABS and ASC systems can be very dangerous, especially in emergency braking or slippery conditions. A professional technician should:

  1. Scan for OBD Codes: Use an advanced diagnostic scanner to retrieve specific ABS/ASC trouble codes. This is the most crucial first step.
  2. Inspect Wheel Speed Sensors and Wiring: Check each sensor for damage, proper connection, and cleanliness. Test their output.
  3. Check Brake Fluid Level and Condition: Ensure the fluid is at the correct level and isn't contaminated.
  4. Bleed Brake System: If air is suspected, a thorough brake bleed is necessary, potentially including an ABS module bleed using a scan tool.
  5. Test ABS Module: If other components check out, the ABS module itself may need testing or replacement. This often requires specialized equipment.

Address this issue promptly to restore full braking and stability control functionality.

Menu

Help & account