Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
C1AC200Rear Side Radar Sensor Beam Axis Misalignment
Manufacturer communications
3Original wording in English
TOYOTA
Some 2021 – 2024 model year Sienna Hybrid vehicles equipped with a Blind Spot Monitor may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) C1AC200 (Rear Side Radar Sensor Beam Axis Misalignment) present and Blind Spot Monitor inoperative system warnings displayed.
TOYOTA
TSB: Some 2019 model year Tacoma vehicles may exhibit a Blind Spot Monitor System warning message with any of the following Diagnostic Trouble Codes (DTCs) present. ? C1AC1 ? Master Module Horizontal Axis Misalignment ? C1AC2 ? Slave Module Horizontal Axis Misalignment. Follow the Repair Procedure in this bulletin to address thi…
TOYOTA
TSB: Some 2016 ? 2018 model year Tacoma vehicles may exhibit a Blind Spot Monitor System Warning message with any of the following Diagnostic Trouble Codes (DTCs) present. ? U0232 ? Lost Communication with Blind Spot Monitor Slave Module ? U0233 ? Lost Communication with Blind Spot Monitor Master Module ? C1AC1 ? Master Module H…
Check vehicle applicability
8A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Toyota | SIENNA HYBRID ↗ | 2024 |
| Toyota | SIENNA HYBRID ↗ | 2023 |
| Toyota | SIENNA HYBRID ↗ | 2022 |
| Toyota | SIENNA HYBRID ↗ | 2021 |
| Toyota | TACOMA ↗ | 2019 |
| Toyota | TACOMA ↗ | 2018 |
| Toyota | TACOMA ↗ | 2017 |
| Toyota | TACOMA ↗ | 2016 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.