C1AA0 on Lexus
Manufacturer-Specific Chassis Code (commonly camera/driver-assist sensor circuit)
C1AA0 on Lexus vehicles indicates manufacturer-specific chassis code (commonly camera/driver-assist sensor circuit). Au7o has documented this code across 2 Lexus models — most commonly on IS, RX. C1AA0 is a manufacturer-specific chassis (C) trouble code, so its exact meaning varies by automaker. It generally points to a fault in a chassis safety or driver-assistance subsystem; on several makes it is associated with a forward camera or related sensor circuit used for features like lane-keeping or collision warning. Because the precise definition differs between manufacturers, the affected component should be confirmed against the specific vehicle's service information. It usually indicates the controlling module detected a circuit or signal fault in that subsystem. Typical repair costs on Lexus range from $250 to $1,800, depending on the specific model and root cause.
Common Causes of C1AA0
- •Faulty or obstructed camera/sensor module
- •Damaged wiring or connectors in the sensor circuit
- •Loss of power or ground to the module
- •Corroded or loose connector pins
- •Module software/calibration fault
- •Internal module failure
C1AA0 on Lexus by Model
Lexus IS(1 issue)
- Lexus Safety System+ False Forward Collision / PCS Warnings from Dirty or Misaligned Sensors2023-2025
Some owners report intermittent pre-collision system, radar cruise, or lane-support warnings on 2023-2025 Lexus IS models, often after heavy rain, road grime buildup, windshield contamination, or minor front-end impacts. The system may temporarily disable with a message indicating the camera or radar is unavailable, even though no permanent hardware failure exists. In other cases, sensor alignment or calibration drift after windshield or bumper work can trigger recurring warnings.
Lexus RX(1 issue)
- Front Camera / Millimeter-Wave Radar Misalignment Causing PCS and Driver-Assist Warnings2023-2025
Owners of the current-generation RX have reported recurring messages such as 'Pre-Collision System Malfunction,' 'Front Camera Unavailable,' or temporary loss of adaptive cruise and lane functions. These complaints appear in NHTSA filings and owner forums, often after windshield replacement, minor impacts, heavy rain, or sometimes with no obvious trigger. The issue is commonly related to camera/radar obstruction, calibration drift, connector faults, or software sensitivity in the Lexus Safety System+ suite.
Looking for C1AA0 on a different make?
View C1AA0 across all makes →Frequently Asked Questions
What does C1AA0 mean on Lexus?▼
C1AA0 stands for "Manufacturer-Specific Chassis Code (commonly camera/driver-assist sensor circuit)." C1AA0 is a manufacturer-specific chassis (C) trouble code, so its exact meaning varies by automaker. It generally points to a fault in a chassis safety or driver-assistance subsystem; on several makes it is associated with a forward camera or related sensor circuit used for features like lane-keeping or collision warning. Because the precise definition differs between manufacturers, the affected component should be confirmed against the specific vehicle's service information. It usually indicates the controlling module detected a circuit or signal fault in that subsystem. On Lexus specifically, this code is documented across 2 models.
What causes C1AA0 on Lexus vehicles?▼
Common causes on Lexus: Faulty or obstructed camera/sensor module, Damaged wiring or connectors in the sensor circuit, Loss of power or ground to the module, Corroded or loose connector pins, Module software/calibration fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1AA0 on a Lexus?▼
Repair costs on Lexus range from $250 to $1,800, depending on the specific model and root cause.
Which Lexus models have C1AA0 documented?▼
Au7o has documented C1AA0 on 2 Lexus models: IS, RX.