C110B on Audi: How to Diagnose & Fix
Adaptive Cruise Control Sensor - Restricted View
1 Audi model · 1 documented issue
C110B on Audi by model: symptoms, diagnosis and fix
On adaptive-cruise-equipped 2011-2018 Audi A8 vehicles, ACC may be unavailable and the distance-regulation controller may store C110BF0, adaptive cruise control sensor restricted view. Audi identifies environmental obstruction, sensor contamination, bumper or bracket influence and alignment/calibration conditions as diagnostic branches; the code alone does not prove that the radar sensor has failed.
Common Symptoms
- Adaptive cruise control unavailable
- Restricted-view message or C110BF0 stored
How to Fix
Record the exact fault and environmental conditions. Inspect and clean the sensor field of view, then inspect the bumper, sensor mount and alignment before any parts decision. Calibration requires Audi-approved alignment and target equipment. Replace a sensor only after guided diagnosis identifies an internal fault.
Sources for this issue (1)
C110B 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 C110B mean on a Audi?
C110B stands for "Adaptive Cruise Control Sensor - Restricted View." The distance regulation control module J428 has determined that one or both ACC radar sensors have gone an extended period without detecting any object, which the software interprets as the sensor's field of view being obstructed. ACC and the braking guard are deactivated as a protective measure. Audi TSB 2033355 covers this condition on 2011-2018 A8 and related A6/A7 models. On Audi it is documented across 1 model: A8.
What are the most common causes of C110B?
The most common causes of C110B are: Snow, ice, mud, road salt, or heavy dirt on the radar sensor cover or bumper area, Aftermarket license plate frame, bracket, or bumper accessory in front of the sensor, Front-end damage or a repainted/repaired bumper altering radar transmissivity, Radar sensor out of alignment after bumper or suspension work, Extended driving on an empty road with no targets (can set the code benignly), Failed radar sensor requiring replacement and calibration. The specific cause varies by vehicle.
How much does it cost to fix C110B on a Audi?
Repair costs vary widely with the root cause and Audi 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.