P0944 on Audi
Hydraulic Pressure Unit Loss of Pressure
P0944 on Audi vehicles indicates hydraulic pressure unit loss of pressure. Au7o has documented this code across 1 Audi model — most commonly on R8. The hydraulic pressure unit has lost pressure — the system cannot build or hold the hydraulic pressure needed for clutch/shift actuation. Typical repair costs on Audi range from $900 to $4,000, depending on the specific model and root cause.
Common Causes of P0944
- •Internal/external hydraulic leak
- •Failed pump or motor
- •Failed accumulator
- •Faulty pressure control valve
P0944 on Audi by Model
Audi R8(1 issue)
- R tronic Hydraulic Pump and Pressure Accumulator Failure2008-2015
The first-generation R8's optional R tronic single-clutch automated-manual gearbox relies on an electro-hydraulic system (shared with the Lamborghini Gallardo e-gear) to build and hold the pressure that operates the clutch and gear actuators. As miles accumulate, the nitrogen pressure accumulator loses its charge and/or internal seals leak, which forces the electric hydraulic pump to cycle far more often to maintain pressure. The overworked pump then overheats, blows its 30A fuse, or fails outright, and a relay can weld. This is a distinct failure of the hydraulic PRESSURE SOURCE, separate from clutch-friction wear or the later S tronic mechatronic actuator. When pressure is lost the car can become stuck in neutral and undriveable, sometimes with little warning. An Audi TSB for the R8 R-tronic addresses this failure mode, citing three root causes: an external hydraulic fluid leak, an internal leak with fluid loss, and an internal leak without fluid loss from damaged O-rings on the gear-selection solenoid valves.
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View P0944 across all makes →Frequently Asked Questions
What does P0944 mean on Audi?▼
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. On Audi specifically, this code is documented across 1 model.
What causes P0944 on Audi vehicles?▼
Common causes on Audi: Internal/external hydraulic leak, Failed pump or motor, Failed accumulator, Faulty pressure control valve. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0944 on a Audi?▼
Repair costs on Audi range from $900 to $4,000, depending on the specific model and root cause.
Which Audi models have P0944 documented?▼
Au7o has documented P0944 on 1 Audi model: R8.