C1A12: Manufacturer-Specific Chassis Code (Nissan/Infiniti: Radar/Laser Sensor Beam Off-Center)
4 vehicles · 2 makes · $250-$1,800 repair
Most Reported On
C1A12 is an OBD-II diagnostic trouble code meaning “Manufacturer-Specific Chassis Code (Nissan/Infiniti: Radar/Laser Sensor Beam Off-Center).” This is a manufacturer-specific chassis code seen primarily on Nissan/Infiniti vehicles, generally associated with the forward radar/laser sensor used by adaptive cruise control and collision-avoidance systems being misaligned or 'off-center.' Because it is not a generic SAE code, the exact meaning can vary by maker and model, but it broadly points to an issue with the driver-assistance/distance sensor or its aim. When set, related systems like intelligent cruise control or forward emergency braking may be disabled. A vehicle-specific service procedure (sensor aiming/calibration) is typically required. This code is most commonly reported on 2023-2025 Nissan Sentra, 2022-2025 Infiniti QX60, and 2021-2024 Nissan Murano, plus 1 other vehicle, with repair costs ranging from $250 to $1,800.
Common Causes
Typical Repair Cost
Based on 4 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C1A12, 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
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (4)
Front Collision Warning / Automatic Emergency Braking False Activation and Sensor Malfunction
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 C1A12 mean?
C1A12 stands for "Manufacturer-Specific Chassis Code (Nissan/Infiniti: Radar/Laser Sensor Beam Off-Center)." This is a manufacturer-specific chassis code seen primarily on Nissan/Infiniti vehicles, generally associated with the forward radar/laser sensor used by adaptive cruise control and collision-avoidance systems being misaligned or 'off-center.' Because it is not a generic SAE code, the exact meaning can vary by maker and model, but it broadly points to an issue with the driver-assistance/distance sensor or its aim. When set, related systems like intelligent cruise control or forward emergency braking may be disabled. A vehicle-specific service procedure (sensor aiming/calibration) is typically required.
What are the most common causes of C1A12?
The most common causes of C1A12 are: Misaligned or blocked forward radar/laser sensor, Sensor knocked out of aim by minor impact or bumper work, Obstruction or dirt over the sensor (snow, ice, debris), Faulty distance/radar sensor, Wiring or connector fault at the sensor, Sensor calibration not performed after service/alignment. The specific cause varies by vehicle.
How much does it cost to fix C1A12?
Repair costs for C1A12 range from $250 to $1,800, depending on the vehicle and root cause.
Which vehicles are affected by C1A12?
Au7o has documented C1A12 across 4 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.