C1A16 on Nissan
Manufacturer-Specific Chassis Code (Nissan/Infiniti: Radar/Distance Sensor Obstruction or Misalignment)
C1A16 on Nissan vehicles indicates manufacturer-specific chassis code (nissan/infiniti: radar/distance sensor obstruction or misalignment). Au7o has documented this code across 4 Nissan models — most commonly on Murano, Rogue, Sentra. 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. Typical repair costs on Nissan range from $200 to $1,800, depending on the specific model and root cause.
Common Causes of C1A16
- •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
C1A16 on Nissan by Model
Nissan Murano(1 issue)
- Front Radar/Sensor Malfunctions Triggering AEB, ICC, and Forward Collision Warnings2021-2024
Owners have reported intermittent 'Front radar unavailable,' AEB/FCW warnings, disabled intelligent cruise control, and related driver-assistance faults on 2021-2024 Murano models. In many cases the system disables itself in rain, road spray, or after minor front-end impacts, but some complaints describe repeated warnings in normal conditions due to sensor alignment, bracket movement, contamination, or radar unit faults. Because these systems are tied to emergency braking and adaptive cruise functions, repeated failures are a significant safety concern.
Nissan Rogue(1 issue)
- Front Radar / Automatic Emergency Braking False Activation and Sensor Obstruction Warnings2021-2025
Multiple owners of the current-generation Rogue report the forward collision warning / automatic emergency braking system issuing sudden alerts, disabling itself, or in some cases braking unexpectedly with no obstacle present. Complaints commonly mention 'Front radar unavailable due to obstruction' or related warning messages in clear weather, sometimes recurring after restart. This is a safety-related issue because it can cause abrupt deceleration or loss of driver-assistance functions when expected.
Nissan Sentra(1 issue)
- Front Collision Warning / Automatic Emergency Braking False Activation and Sensor Malfunction2023-2025
Multiple owners of the current B18-generation Sentra report the Forward Collision Warning and Automatic Emergency Braking systems triggering warnings or braking unexpectedly, sometimes with no vehicle or obstacle present. Complaints describe sudden deceleration, repeated warning messages, and intermittent disabling of driver-assist features. This is a safety-critical issue because false braking or loss of collision mitigation can increase crash risk in traffic.
Nissan Titan(1 issue)
- Blind Spot Warning / Rear Cross Traffic Alert False Warnings or Inoperative Sensors2020-2024
Owners have reported blind spot monitoring and rear cross traffic alert systems giving false warnings, becoming unavailable, or showing persistent malfunction messages on 2020+ Titans. The problem is often linked to rear bumper radar sensor alignment, water intrusion, impact damage from minor bumps, or calibration issues after bumper work. While not usually immobilizing, it disables a key driver-assistance feature and can create nuisance alerts.
Looking for C1A16 on a different make?
View C1A16 across all makes →Frequently Asked Questions
What does C1A16 mean on Nissan?▼
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. On Nissan specifically, this code is documented across 4 models.
What causes C1A16 on Nissan vehicles?▼
Common causes on Nissan: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1A16 on a Nissan?▼
Repair costs on Nissan range from $200 to $1,800, depending on the specific model and root cause.
Which Nissan models have C1A16 documented?▼
Au7o has documented C1A16 on 4 Nissan models: Murano, Rogue, Sentra, Titan.