C11D1 on Porsche
Rear Axle Steering - Travel Blocked
C11D1 on Porsche vehicles indicates rear axle steering - travel blocked. Au7o has documented this code across 1 Porsche model — most commonly on 911. The rear axle steering control unit has determined that a rear-wheel steering actuator could not reach its commanded position - the servo travel is being blocked or the position feedback does not follow the command. The system fails safe by locking the rear wheels straight and disabling rear-axle steering. Porsche Technical Information 07/25 (ENU 4883) documents C11D1F5 "Travel blocked (000028)" stored together with C1445F2 on 2025-onward 992 Carrera GTS, Carrera 4 GTS, Turbo and Turbo S with rear axle steering (M-No. 0N5).
Common Causes of C11D1
- •Rear axle steering control unit software calibration issue - Porsche's documented remedy is re-programming with PIWIS Tester software 43.200.031 or higher
- •Mechanical binding or obstruction in the rear-axle steering actuator
- •Debris, impact, or corrosion damage to the servo motor or its linkage
- •Internal servo motor or position sensor fault
C11D1 on Porsche by Model
Porsche 911(1 issue)
- "Rear Axle Steering Failed" Warning from Right Servo Motor Fault Codes2025-2026
Porsche Technical Information 07/25 ENU 4883 applies to the 911 Carrera GTS (992), 911 Carrera 4 GTS (992), 911 Turbo (992) and 911 Turbo S (992) from model year 2025 equipped with rear axle steering (M-no. 0N5). The customer complaint is that "the yellow warning message 'Rear axle steering failed' in the instrument cluster lights up in conjunction with dynamic cornering." The rear axle steering control unit stores C1445F2 (malfunction of right servo motor, 000015) and C11D1F5 (travel blocked, 000028). Despite naming the right servo motor and a blocked-travel condition, Porsche's remedy is a control unit re-programming, which indicates the codes are a software artifact rather than a mechanically seized actuator. Rear axle steering is optional on the GTS cars and standard on Turbo models, so this is fitment-gated - a 992 without M-no. 0N5 cannot exhibit it.
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What does C11D1 mean on Porsche?▼
C11D1 stands for "Rear Axle Steering - Travel Blocked." The rear axle steering control unit has determined that a rear-wheel steering actuator could not reach its commanded position - the servo travel is being blocked or the position feedback does not follow the command. The system fails safe by locking the rear wheels straight and disabling rear-axle steering. Porsche Technical Information 07/25 (ENU 4883) documents C11D1F5 "Travel blocked (000028)" stored together with C1445F2 on 2025-onward 992 Carrera GTS, Carrera 4 GTS, Turbo and Turbo S with rear axle steering (M-No. 0N5). On Porsche specifically, this code is documented across 1 model.
What causes C11D1 on Porsche vehicles?▼
Common causes on Porsche: Rear axle steering control unit software calibration issue - Porsche's documented remedy is re-programming with PIWIS Tester software 43.200.031 or higher, Mechanical binding or obstruction in the rear-axle steering actuator, Debris, impact, or corrosion damage to the servo motor or its linkage, Internal servo motor or position sensor fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C11D1 on a Porsche?▼
Repair costs vary widely depending on the root cause and specific Porsche model.
Which Porsche models have C11D1 documented?▼
Au7o has documented C11D1 on 1 Porsche model: 911.