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2019 Q5 S-Tronic Hesitation and Rough Shifting at Low Speeds

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Mike T. · rep 0 · May 25, 3:11 AM · 1 replies · solved · Question

Vehicle: 2019 Audi Q5 2.0T Quattro Prestige

Hello Audi community,

I own a 2019 Audi Q5 2.0T Quattro, Prestige trim, and I've been noticing some unusual behavior from the S-Tronic transmission. When driving at lower speeds, especially in stop-and-go traffic, the car feels hesitant to engage first gear, and sometimes it lurches or shifts quite harshly between first and second.

It's not a constant issue, but it's happening more frequently now. There's no Check Engine Light on, and no warning messages on the dash. It just feels like the transmission isn't as smooth as it used to be. Has anyone with a similar Q5 experienced this? Could it be a software issue, or something more serious like the mechatronics unit or clutch packs?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:11 AM

0

ClearTheCode admin answer:

Transmission hesitation and rough shifting at low speeds in Audi's S-Tronic (DSG) transmissions are not uncommon, and while sometimes benign, they can also point to underlying issues. Here's a breakdown:

Common Causes:

  1. Mechatronics Unit Issues: This is the control unit for the S-Tronic transmission, combining hydraulic and electronic components. Problems here can lead to erratic shifting, hesitation, and harsh gear engagement. Internal solenoids or pressure sensors can fail.
  2. Clutch Pack Wear: The S-Tronic uses dual clutch packs. Over time, especially with aggressive driving or frequent stop-and-go traffic, these clutches can wear, leading to slipping, hesitation, or harsh engagement. The 'wet' clutch design in your Q5 is generally robust but not immune to wear.
  3. Transmission Fluid Quality/Level: Incorrect fluid levels or degraded fluid can impact shifting performance. While sealed, regular service intervals for fluid and filter changes are crucial.
  4. Software Glitches/Adaptations: Sometimes, the transmission control module (TCM) can develop minor software glitches or require re-adaptation. Updates are occasionally released to address known shifting eccentricities.

Diagnostics & What to Do:

  1. Scan for Codes: Even without a CEL, a professional scan tool (like VCDS or ODIS) can read transmission-specific fault codes (e.g., P0700 series codes related to the TCM) and check live data for clutch pressures and gear engagement.
  2. Transmission Adaptation Reset: In some cases, resetting the transmission's adaptive values can help. This should be done by a professional who understands the proper procedure.
  3. Fluid and Filter Check/Change: Verify the transmission fluid level and condition. If due, a complete fluid and filter change might be beneficial, though this is a specialized procedure for S-Tronic units.

When to See a Shop:

  • Promptly: If the hesitation and harshness are becoming more frequent or severe, it's advisable to have your Audi Q5 inspected by an Audi specialist. Early diagnosis can prevent minor issues from escalating into costly repairs. Continuing to drive with significant transmission issues can cause further damage to internal components.
  • Specialized Tools: S-Tronic diagnostics and repairs often require specialized tools and knowledge, so choose a shop experienced with Audi's DSG transmissions.
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