01155 on Audi
Clutch (Haldex AWD) - Mechanical Malfunction
01155 on Audi vehicles indicates clutch (haldex awd) - mechanical malfunction. Au7o has documented this code across 1 Audi model — most commonly on TT. VAG fault code 01155 is logged by the all-wheel-drive control module (Haldex coupling used on VW 4Motion and Audi quattro transverse platforms) and indicates a mechanical malfunction of the AWD clutch. It typically means the Haldex multi-plate clutch pack cannot build or hold the commanded clamping pressure, so torque is not being properly transferred to the rear axle. Status text usually reads "Clutch, Mechanical" (e.g. 003 Mechanical Failure, intermittent or static). Typical repair costs on Audi range from $180 to $1,500, depending on the specific model and root cause.
Common Causes of 01155
- •Clogged Haldex filter / pre-charge pump strainer restricting oil flow
- •Worn or degraded Haldex fluid past service interval
- •Failed or weak Haldex pump (electro-hydraulic actuator)
- •Worn clutch pack / mechanical wear inside the coupling
- •Failed Haldex control unit (J492) or wiring/connector fault
- •Low oil level or internal seal/pressure leak in the coupling
01155 on Audi by Model
Audi TT(1 issue)
- Haldex AWD Coupling Pump/Controller Failure Leading to Front-Wheel-Drive Only Operation2000-2006
Quattro-equipped Audi TT models use a Haldex coupling that can lose rear-drive engagement when the pump, controller, fluid, or filter service is neglected. Owners report the car behaving like front-wheel drive, especially during hard acceleration or slippery conditions, often with stored AWD-related faults. The issue is well documented in TT and VW R32 communities because the same Haldex generation is service-sensitive and prone to pump contamination or controller faults.
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What does 01155 mean on Audi?▼
01155 stands for "Clutch (Haldex AWD) - Mechanical Malfunction." VAG fault code 01155 is logged by the all-wheel-drive control module (Haldex coupling used on VW 4Motion and Audi quattro transverse platforms) and indicates a mechanical malfunction of the AWD clutch. It typically means the Haldex multi-plate clutch pack cannot build or hold the commanded clamping pressure, so torque is not being properly transferred to the rear axle. Status text usually reads "Clutch, Mechanical" (e.g. 003 Mechanical Failure, intermittent or static). On Audi specifically, this code is documented across 1 model.
What causes 01155 on Audi vehicles?▼
Common causes on Audi: Clogged Haldex filter / pre-charge pump strainer restricting oil flow, Worn or degraded Haldex fluid past service interval, Failed or weak Haldex pump (electro-hydraulic actuator), Worn clutch pack / mechanical wear inside the coupling, Failed Haldex control unit (J492) or wiring/connector fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix 01155 on a Audi?▼
Repair costs on Audi range from $180 to $1,500, depending on the specific model and root cause.
Which Audi models have 01155 documented?▼
Au7o has documented 01155 on 1 Audi model: TT.