Clutch Pedal Spongy Low Pedal Effort

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Cause	Action
DEFINITION: The clutch pedal may feel spongy, or it requires very little effort to operate. Review Symptoms - Clutch and perform the necessary inspections. WARNING: For vehicles equipped with push button start in which a clutch malfunction is suspected, always sit in the driver's seat and firmly apply the brake before starting the vehicle. Do not press the "start" button for any reason from outside the vehicle. A vehicle with a malfunctioning clutch could immediately move when started, which could cause personal injury or property damage.
Air in the hydraulic system	Bleed the clutch hydraulic system. Refer to Hydraulic Clutch System Bleeding .
Master cylinder fluid level low	Inspect for leakage in the clutch master cylinder, hose connections, and the clutch actuator. Repair or replace any faulty components.
Incomplete pedal return	Inspect the pedal for full return. Clear any obstacles that may interfere with the pedal operation. Adjust the clutch pedal position sensor. Refer to Clutch Pedal Position Sensor Replacement .
Clutch incorrectly installed	Replace the clutch assembly. Refer to Clutch Assembly Replacement (M3L Transmission) .
Clutch mounting bolts loose or broken	Remove the broken bolts. Replace the broken or loose bolts, and tighten. Refer to Clutch Assembly Replacement (M3L Transmission) .
Release bearing worn or damaged	Replace the release bearing. Refer to Clutch Concentric Actuator Cylinder Replacement .
Contaminated hydraulic fluid	Inspect the clutch hydraulic fluid for contamination of moisture. Inspect the reservoir cap for being faulty if moisture is present. Inspect the clutch hydraulic fluid for dirt or debris. Flush and bleed the clutch hydraulic system if the above conditions are found. Refer to Hydraulic Clutch System Bleeding .