P0944 on 2008-2015 Audi R8 (R8 4.2 R tronic, R8 V10 R tronic, R8 V10 Plus R tronic) — Hydraulic Pressure Unit Loss of Pressure
1 vehicles · 1 makes · $900-$4,000 repair
Most Reported On
P0944 is an OBD-II diagnostic trouble code meaning “Hydraulic Pressure Unit Loss of Pressure.” The hydraulic pressure unit has lost pressure — the system cannot build or hold the hydraulic pressure needed for clutch/shift actuation. This code is most commonly reported on 2008-2015 Audi R8 (R8 4.2 R tronic, R8 V10 R tronic, R8 V10 Plus R tronic), with repair costs ranging from $900 to $4,000.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0944, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
FAQ
What does P0944 mean?
P0944 stands for "Hydraulic Pressure Unit Loss of Pressure." The hydraulic pressure unit has lost pressure — the system cannot build or hold the hydraulic pressure needed for clutch/shift actuation.
What are the most common causes of P0944?
The most common causes of P0944 are: Internal/external hydraulic leak, Failed pump or motor, Failed accumulator, Faulty pressure control valve. The specific cause varies by vehicle.
How much does it cost to fix P0944?
Repair costs for P0944 range from $900 to $4,000, depending on the vehicle and root cause.
Which vehicles are affected by P0944?
Au7o has documented P0944 across 1 vehicle models from 1 manufacturers: Audi.
Sources (4)
- article2009-2013 Audi R8 & Lamborghini Gallardo R-Tronic/E-Gear Pump Failure: Diagnosis and Buyer's Guide
- ForumR-Tronic Accumulator replacement? - Audi R8 Forums (r8talk)
- ForumAUDI R8 V8 2009 R-tronic warning message - P0944 - Audi R8 Forums (r8talk)
- ForumR-tronic hydraulic pump pressuring too often? - Audi R8 Forums (r8talk)
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.