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2018 A4 Allroad S-tronic hesitation and jerking on acceleration

0

Mike T. · rep 0 · May 26, 3:42 AM · 1 replies · solved · Question

Vehicle: 2018 Audi A4 Allroad Prestige

My 2018 A4 Allroad Prestige has started acting strange. When I accelerate from a stop, especially in traffic, there's a noticeable hesitation, almost like it's slipping, and then it lurches forward. It's an S-tronic transmission.

It feels like the clutch isn't engaging smoothly. Sometimes, shifting from 1st to 2nd is also a bit rough. It's getting worse and I'm worried about long-term damage.

Has anyone else experienced this with their Allroad? What was the fix? I'm trying to avoid an expensive trip to the dealer if it's something minor.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:42 AM

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  1. Check for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner. Common codes for S-tronic issues include P17E1 (Clutch 1 Pressure Adaptation Limit Reached) or P17D8 (Clutch Temperature Monitoring). These indicate potential issues with the mechatronics unit or clutch packs.
  2. Transmission Fluid Level and Condition: While less common on sealed units, an incorrect fluid level or degraded fluid can contribute to shifting issues. This usually requires specialized tools to check.
  3. Software Update: Audi frequently releases software updates for transmission control modules (TCMs) to address shifting anomalies and improve performance. A dealer can check if your vehicle has the latest software.
  4. Mechatronics Unit Failure: The mechatronics unit is the control center for the S-tronic transmission. It contains solenoids and sensors that direct fluid pressure to engage clutches. Failure can lead to rough shifts, hesitation, or complete transmission failure.
  5. Clutch Pack Wear: Over time, the wet clutch packs can wear down, leading to slipping and hesitation. This is a more significant repair.

When to see a shop: If you're experiencing noticeable hesitation, jerking, or if a "Transmission Malfunction" warning appears on your dashboard, it's crucial to have your Audi A4 Allroad inspected by a qualified Audi specialist or dealership. Ignoring these symptoms can lead to more extensive and costly damage to the transmission. Early diagnosis can often prevent further issues and might only require a software recalibration or a less invasive repair.

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