LEXUS fault codes
Coverage shown is Toyota data: 12,945 codes · 876 vehicle records · 1,973 ECU records · 43,462 live-data parameters.
LEXUS shares fault-code data with Toyota. Data may not cover LEXUS-specific systems.
Codes 12,945
| Code | Description | Brands | System |
|---|---|---|---|
| B181D | ABS or electronic stability program ECU relay control failure | 4 | Body |
| B1820 | driver recline rearward switch circuit malfunction | 21 | Body |
| B1821 | R side side ignition system open circuit | 11 | Body |
| B1822 | R side side ignition system ground shorted | 11 | Body |
| B1823 | D seat side side ignition system power short | 12 | Body |
| B1824 | The Lock bolt Motor is not supplied in Direction unLock | 8 | Body |
| B1825 | Engine oil level information failure | 17 | Body |
| B1826 | Engine oil pressure alarm failure | 19 | Body |
| B1827 | Downshift paddle stuck | 12 | Body |
| B1828 | Upshift paddle stuck | 13 | Body |
| B1829 | Traction battery charging status fault | 14 | Body |
| B1830 | High frequency function failure | 19 | Body |
| B1831 | High frequency function failure | 19 | Body |
| B1832 | ECU internal fault | 18 | Body |
| B1833 | Key transponder failure | 18 | Body |
| B1834 | Transponder malfunction | 15 | Body |
| B1835 | High frequency function failure | 18 | Body |
| B1836 | Transponder antenna failure | 19 | Body |
| B1837 | Communication failure with transponder | 17 | Body |
| B1838 | Centralized steering wheel ECU power failure | 20 | Body |
| B1839 | The function button of the descent control system is stuck | 15 | Body |
| B183A | Driver Seat Massage Switch Circuit | 9 | Body |
| B183B | Seat Lumbar Support Switch Signal Circuit | 9 | Body |
| B183C | Seat Bolster/Massage Switch Signal Circuit | 9 | Body |
| B183D | ECU Main Controller Error | 9 | Body |
| B1840 | Consistency fault between electronic key reader start request and engine start switch pressing | 16 | Body |
| B1841 | USB 1 interface circuit overcurrent | 14 | Body |
| B1842 | USB 2 interface circuit overcurrent | 13 | Body |
| B1843 | Screen overvoltage | 7 | Body |
| B1845 | driver lumbar down switch circuit malfunction | 11 | Body |
| B1846 | No description available | 12 | Body |
| B1847 | Infotainment Head Unit (IHU) detected to be inconsistent with the gateway network management type | 13 | Body |
| B1848 | No description available | 12 | Body |
| B184A | No description available | 8 | Body |
| B184B | No description available | 8 | Body |
| B184C | Activation active | 9 | Body |
| B184D | No description available | 8 | Body |
| B1850 | driver lumbar horiz sensor circuit malfunction | 15 | Body |
| B1851 | Driver lumbar horizontal sensor circuit performance | 15 | Body |
| B1852 | Collision signal connection | 17 | Body |
| B1853 | Collision signal communication | 14 | Body |
| B1855 | Lumbar Support Horizontal Feedback Circuit | 14 | Body |
| B1856 | e-Call speaker connection | 15 | Body |
| B1857 | Microphone connection | 14 | Body |
| B1858 | Power trunk lid unit lost communication with MICU | 14 | Body |
| B1860 | Battery voltage too high | 16 | Body |
| B1861 | Battery voltage too low | 17 | Body |
| B1862 | System startup error | 17 | Body |
| B1863 | BT Communication error | 17 | Body |
| B1864 | Movement communication error | 15 | Body |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.