What does the Volkswagen P173500 fault code mean?
1 Answers
The Volkswagen P173500 fault code indicates a malfunction in the transmission control module. It is recommended to have it inspected and repaired at a 4S shop. Symptoms of a faulty transmission control unit include abnormal transmission noise, transmission slippage, and transmission oil leakage. Transmission Abnormal Noise: Prolonged operation in high-temperature conditions can degrade the anti-wear and lubricating properties of transmission fluid, leading to wear or severe damage to components such as bearings and gears, or damage to gear side surfaces. Transmission Slippage: Excessive hydraulic oil levels can generate a large amount of air bubbles when violently agitated by planetary gears during operation. Additionally, wear or burning of clutch and brake friction plates or bands may occur. Transmission Oil Leakage: Transmission oil leakage results in insufficient internal lubrication and accelerates friction between gears, causing the transmission to malfunction. Causes of Transmission Control Unit Failure: Insufficient gear oil or poor-quality gear oil, severe wear on gear surfaces leading to excessive meshing clearance, fatigue spalling or chipping of gear teeth, excessive wear on intermediate or second shafts, or severe wear on spline shafts and internal gear splines causing excessive clearance, bent shafts or loose shaft locking components, loose bearings or damaged bearing cages, and unintended contact or rubbing of shift fork non-working parts.
