U0435 on Cadillac: How to Diagnose & Fix
Invalid Data Received From Power Steering Control Module – Rear
1 Cadillac model · 1 documented issue
U0435 on Cadillac by model: symptoms, diagnosis and fix
GM bulletin 17-NA-130 covers 2016–2017 CT6 vehicles equipped with Active Rear Steer (RPO NYS). A Service Soon message and U0435 may occur when the rear-steer module fails to initialize during remote start while the EBCM expects it to.
Common Symptoms
- Service Soon message
- U0435 recorded during the described remote-start condition
How to Fix
Have a qualified technician verify the vehicle's NYS equipment, stored codes and remote-start behavior. For the condition in 17-NA-130, GM specifies updating the EBCM software and calibration using its programming procedure. Other steering symptoms or persistent faults still need diagnosis. Ask the dealer to confirm applicable coverage and provide an estimate; the bulletin does not set a universal retail price or guarantee a free repair.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (2)
- GM Bulletin 17-NA-130 (Apr 2017) — Service Soon Message On, Active Rear Steer (ARS) Receives Invalid Data and Sets DTC U0435, 2016-2017 Cadillac CT6 with RPO NYStsb
- Cadillac Forums — Service active steering (2017 CT6 Premium Luxury, message appears on remote start; software update quoted as non-covered)forum
U0435 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 U0435 mean on a Cadillac?
U0435 stands for "Invalid Data Received From Power Steering Control Module – Rear." Generic network DTC. Sets when a receiving module gets missing, corrupted, or implausible data from the Rear Power Steering Control Module (rear-wheel/4-wheel steering) over the bus. On Cadillac it is documented across 1 model: CT6.
What are the most common causes of U0435?
The most common causes of U0435 are: Faulty rear steering control module, Chafed/shorted or open bus wiring, Corroded/loose connector pins, Poor module power or ground, Low system voltage. The specific cause varies by vehicle.
How much does it cost to fix U0435 on a Cadillac?
Repair costs vary widely with the root cause and Cadillac model; each issue on this page carries its own estimate where one is published.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.