What does 'p177c clutch 2 reaching tolerance limit' mean?
2 Answers
p177c clutch 2 reaching tolerance limit refers to when the clutch establishes working pressure, the piston exceeds its movement limit due to excessive travel distance, indicating clutch wear. Below is relevant information: 1. Clutch: The clutch is located in the flywheel housing between the engine and transmission, with the clutch assembly fixed to the rear plane of the flywheel using screws. The output shaft of the clutch serves as the input shaft of the transmission. During vehicle operation, the driver can depress or release the clutch pedal as needed to temporarily disconnect or gradually engage the engine and transmission, thereby interrupting or transmitting power from the engine to the transmission. 2. Clutch types: Clutches are categorized into four types: electromagnetic clutches, magnetic particle clutches, friction clutches, and hydraulic clutches.
I've just researched this trouble code, P177C indicates that the clearance of clutch 2 exceeds the manufacturer's specified range. In layman's terms, it means the clutch disc is too worn, creating excessive clearance - just like when shoe soles wear thin after long use. The transmission control module detects abnormal signals and triggers the fault. From my experience, this issue commonly occurs in dual-clutch transmissions, especially in some European vehicles. While initial symptoms may only include jerky shifting or power interruption, continued driving could lead to complete clutch failure. You'll need to visit a professional workshop to confirm actual tolerance values using a diagnostic scanner, while also checking the hydraulic system for leaks since insufficient oil pressure can cause similar faults. For repairs, it may require replacing clutch discs or adjusting clearance shims, depending on the extent of wear.
