C1A16: Manufacturer-Specific Chassis Code (Nissan/Infiniti: Radar/Distance Sensor Obstruction or Misalignment)
5 vehicles · 2 makes · $200-$1,800 repair
Most Reported On
C1A16 is an OBD-II diagnostic trouble code meaning “Manufacturer-Specific Chassis Code (Nissan/Infiniti: Radar/Distance Sensor Obstruction or Misalignment).” C1A16 is a manufacturer-specific chassis code commonly seen on Nissan and Infiniti vehicles equipped with intelligent cruise control and forward-collision/automatic emergency braking, where it relates to the front radar/distance sensor being blocked, dirty, misaligned, or otherwise unable to function. The driver-assistance module monitors the radar and sets this code when the sensor's view is obstructed or its signal is unreliable, often disabling those safety features. Because it can disable collision-avoidance functions, it carries elevated importance. The exact definition should be confirmed against the specific vehicle. This code is most commonly reported on 2023-2025 Nissan Sentra, 2020-2024 Nissan Titan (SV, PRO-4X, SL, Platinum Reserve), and 2022-2025 Infiniti QX60, plus 2 other vehicles, with repair costs ranging from $200 to $1,800.
Common Causes
Typical Repair Cost
Based on 5 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C1A16, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (5)
Front Collision Warning / Automatic Emergency Braking False Activation and Sensor Malfunction
Blind Spot Warning / Rear Cross Traffic Alert False Warnings or Inoperative Sensors
Front Radar/Sensor Malfunctions Triggering AEB, ICC, and Forward Collision Warnings
Front Radar / Automatic Emergency Braking False Activation and Sensor Obstruction Warnings
FAQ
What does C1A16 mean?
C1A16 stands for "Manufacturer-Specific Chassis Code (Nissan/Infiniti: Radar/Distance Sensor Obstruction or Misalignment)." C1A16 is a manufacturer-specific chassis code commonly seen on Nissan and Infiniti vehicles equipped with intelligent cruise control and forward-collision/automatic emergency braking, where it relates to the front radar/distance sensor being blocked, dirty, misaligned, or otherwise unable to function. The driver-assistance module monitors the radar and sets this code when the sensor's view is obstructed or its signal is unreliable, often disabling those safety features. Because it can disable collision-avoidance functions, it carries elevated importance. The exact definition should be confirmed against the specific vehicle.
What are the most common causes of C1A16?
The most common causes of C1A16 are: Obstructed radar sensor (snow, ice, mud, debris, emblem/badge), Misaligned or knocked sensor bracket (often after a minor impact), Damaged or faulty radar/distance sensor, Wiring or connector problems at the sensor, Aftermarket bumper covers or accessories blocking the sensor, Sensor not recalibrated after bumper/grille work, Driver-assistance control module fault. The specific cause varies by vehicle.
How much does it cost to fix C1A16?
Repair costs for C1A16 range from $200 to $1,800, depending on the vehicle and root cause.
Which vehicles are affected by C1A16?
Au7o has documented C1A16 across 5 vehicle models from 2 manufacturers: Infiniti, Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.