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2022 A5 Sportback Transmission Hesitation/Jerking at Low Speeds

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Mike T. · rep 0 · May 26, 3:44 AM · 1 replies · solved · Question

Vehicle: 2022 Audi A5 Sportback 45 TFSI quattro

Hey everyone,

I'm experiencing some concerning transmission behavior in my 2022 Audi A5 Sportback 45 TFSI quattro. When driving at low speeds, particularly in stop-and-go traffic or when accelerating gently from a near stop, the car sometimes hesitates and then jerks into gear. It feels like it's struggling to decide which gear to be in, and the shift isn't smooth at all.

It's not constant, but it's happening frequently enough to be worrying for a car with only 15,000 miles. There's no check engine light on, but I'm wondering if this is a known issue with the S tronic (DSG) transmission in these models. Could it be a software glitch or something more mechanical? Any advice on what to look for or suggest to the dealership?

Thanks!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:44 AM

0

ClearTheCode admin answer:

Transmission hesitation and jerking at low speeds in your 2022 Audi A5 Sportback 45 TFSI quattro, especially with the S tronic (DSG) dual-clutch transmission, is a concern that should be addressed. While the S tronic is known for its quick shifts, occasional rough or hesitant behavior, particularly at low speeds, can point to several potential issues.

Here are some common causes and diagnostic steps:

  1. Transmission Software Adaptation/Update:
    • Cause: The S tronic transmission uses complex software to manage shifting. Sometimes, the transmission's adaptive learning can get confused by driving styles, or there might be known software bugs that cause rough shifting. Audi frequently releases software updates to refine transmission behavior.
    • Action: A dealership can check for and apply the latest transmission control module (TCM) software updates. They can also perform a "basic setting" or "adaptation reset" for the transmission, which clears learned shift points and allows the transmission to re-learn your driving style.
  2. Low or Contaminated Transmission Fluid:
    • Cause: Although your car is relatively new, incorrect fluid levels or contamination can affect shift quality. The S tronic requires specific fluid types and precise levels.
    • Action: While not typically a DIY check, a technician can inspect the transmission fluid level and condition. Note that S tronic fluid changes are usually scheduled around 40,000 miles, but early issues can occur.
  3. Mechatronics Unit Issues:
    • Cause: The mechatronics unit is the brain of the S tronic, combining the TCM and hydraulic control unit. Failures or malfunctions within this unit (e.g., solenoid issues, pressure sensor problems) can lead to erratic shifting.
    • Action: This requires specialized diagnostic tools and expertise to pinpoint. Fault codes related to the mechatronics unit might not always trigger a generic check engine light but will be visible with an Audi-specific scanner.
  4. Clutch Pack Wear/Issues:
    • Cause: The S tronic uses two clutch packs. While unlikely at 15,000 miles under normal driving, excessive wear or issues with one of the clutches could lead to hesitation or jerking.
    • Action: This is a more significant repair and would be diagnosed by a professional using advanced diagnostics.

Common OBD Codes (if present, though often not for mild hesitation):

  • P07XX series: General transmission codes.
  • P17XX series: Audi-specific transmission codes, often related to the mechatronics unit or sensor readings.

When to See a Shop:

  • Immediately, as transmission issues can worsen and lead to more expensive repairs. Since your car is under warranty, it's crucial to document the issue with the dealership.
  • The dealership or an Audi specialist has the proprietary diagnostic equipment (ODIS/VCDS) to read specific transmission fault codes, monitor live data from the mechatronics unit, and perform necessary software updates or adaptations. Clearly describe the conditions under which the hesitation/jerking occurs (e.g., cold engine, specific gears, light acceleration).
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