C1445 on 2025-2026 Porsche 911 (Carrera GTS, Carrera 4 GTS, Turbo, Turbo S) — Rear Axle Steering - Malfunction of Right Servo Motor
1 vehicles · 1 makes
How to diagnose and fix C1445: most-reported vehicles
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Porsche 911 · 2025–2026
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.
Common Symptoms
- Yellow "Rear axle steering failed" message during hard or dynamic cornering
- Rear axle steering disabled, with a noticeably larger low-speed turning circle
- Warning appears intermittently and may clear on restart
How to Fix
Re-program the rear axle steering control unit using the PIWIS Tester. The minimum programming requirement is PIWIS Tester software release 43.200.031 or higher, and the resulting control unit software release is 0801 or higher. Programming uses the "Automatic programming" function in the rear axle steering control unit's Coding/programming menu and takes up to five minutes; the unit is re-coded automatically afterwards. Do not replace the right rear steering servo motor on the strength of C1445F2 alone until the software update has been applied and the fault memories cleared.
Sources for this issue (1)
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C1445 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 C1445 mean?
C1445 stands for "Rear Axle Steering - Malfunction of Right Servo Motor." The rear axle steering control unit has detected a malfunction of the right-hand rear steering servo motor - the motor is not responding correctly to commands or its feedback is implausible. Rear-axle steering is shut down and the rear wheels are held straight. Porsche Technical Information 07/25 (ENU 4883) documents C1445F2 "Malfunction of right servo motor (000015)" on 2025-onward 992 Carrera GTS, Carrera 4 GTS, Turbo and Turbo S with rear axle steering, usually stored together with C11D1F5.
What are the most common causes of C1445?
The most common causes of C1445 are: Rear axle steering control unit software - Porsche's remedy is re-programming with PIWIS Tester release 43.200.031 or higher (labor op 48832500), Failed right rear servo motor or its position sensor, Wiring, connector, or ground fault at the right rear actuator, Low system voltage during dynamic driving. The specific cause varies by vehicle.
How much does it cost to fix C1445?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by C1445?
Au7o has documented C1445 across 1 vehicle models from 1 manufacturers: Porsche.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.