P173F on 2009-2017 Volkswagen Scirocco (DSG, 1.4 TSI DSG) — Valve 2 Electrical Malfunction in Partial Transmission 1
1 vehicles · 1 makes · $900-$5,000 repair
How to diagnose and fix P173F: most-reported vehicles
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Volkswagen Scirocco · 2009–2017
Sciroccos fitted with the 7-speed dry-clutch DSG (DQ200, used behind lower-torque petrol engines) share the well-known mechatronic and clutch-pack weaknesses of the VW Group transmission. The mechatronic valve-body can split at a thin locating wall and lose hydraulic pressure, giving very rough shifts, jerking, hesitation, stalling (often after 2nd gear) and dashboard gearbox warnings. The dry clutch pack also judders, typically in 2nd gear, as the friction material polishes. Honest John records DQ200 failures with quoted repairs up to £5,000. Higher-torque diesels/2.0 TSI use the wet-clutch DQ250, which is more robust but can still hesitate.
Common Symptoms
- Jerky or harsh gear changes
- Judder in 2nd gear
- Hesitation on acceleration
- Stalling after 2nd gear
- Gearbox warning / limp mode
- Failure to engage drive
How to Fix
Diagnose with VAG-specific scan tooling. The mechatronic unit can be reconditioned with the superseded (upgraded) valve body rather than replaced whole; a juddering clutch pack is replaced. Regular DSG fluid/filter service (where applicable) and a software update for shift mapping help. Address warnings early to avoid being stranded in limp mode.
Sources for this issue (2)
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P173F code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P173F mean?
P173F stands for "Valve 2 Electrical Malfunction in Partial Transmission 1." P173F is a manufacturer-specific VAG (Volkswagen/Audi/SEAT/Skoda) DSG transmission code, most commonly seen on the DQ381 (0GC) 7-speed wet-clutch gearbox. It indicates an electrical malfunction of hydraulic control valve 2 within the mechatronic unit of partial (sub-)transmission 1, meaning the transmission controller has detected an open, short, or out-of-range electrical fault in that solenoid/valve circuit. It typically corresponds to internal DFCC 10743 and is often accompanied by limp mode, loss of gear selection, harsh or jerky shifts, and a "Gearbox Malfunction" dashboard warning.
What are the most common causes of P173F?
The most common causes of P173F are: Failed or short-circuited solenoid/pressure-control valve inside the mechatronic unit, Faulty mechatronic control module (internal electronics failure, common on DQ381/DQ380), Wiring or connector faults to the mechatronic unit (corrosion, chafing, water ingress), Degraded, contaminated, or low DSG transmission fluid affecting valve operation, Internal mechatronic hydraulic blockage or stuck valve, Loss of power supply or ground reference to the transmission control unit. The specific cause varies by vehicle.
How much does it cost to fix P173F?
Repair costs for P173F range from $900 to $5,000, depending on the vehicle and root cause.
Which vehicles are affected by P173F?
Au7o has documented P173F across 1 vehicle models from 1 manufacturers: Volkswagen.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.