Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2009 Lexus LS 460 AWDFACTORY OEM SERVICE PROCEDURE
HVAC DTCS
AIR CONDITIONING AMPLIFIER DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B1411/11 | Room Temperature Sensor Circuit |
| B1412/12 | Ambient Temperature Sensor Circuit |
| B1413/13 | Evaporator Temperature Sensor Circuit |
| B1418/18 | Exhaust Gas Sensor Circuit |
| B1419/19 | Rear Room Temperature Sensor Circuit |
| B1421/21 | Solar Sensor Circuit (Passenger Side) |
| B1423/23 | Pressure Sensor Circuit |
| B1424/24 | Solar Sensor Circuit (Driver Side) |
| B1441/41 | Air Mix Damper Control Servo Motor Circuit (Passenger Side) |
| B1442/42 | Air Inlet Damper Control Servo Motor Circuit |
| B1443/43 | Air Outlet Damper Control Servo Motor Circuit |
| B1446/46 | Air Mix Damper Control Servo Motor Circuit (Driver Side) |
| B1449/49 | Rear Air Outlet Damper Control Servo Motor Circuit |
| B1451/51 | Compressor Solenoid Circuit |
| B1461/61 | Emission Gas NOx Sensor Circuit |
| B1497/97 | BUS IC Communication Malfunction |
| B1499/99 | Multiplex Communication Circuit |
| B1415/15 | Driver Side Duct Sensor |
| B1416/16 | Passenger Side Duct Sensor |
| B1428/28 | Rear Solar Sensor Circuit |
| B1444/44 | Driver Side Cool Air Bypass Damper Control |
| B1445/45 | Passenger Side Cool Air Bypass Damper Control |
| B1448/48 | Passenger Side FACE Servo Motor Circuit |
| B1453/53 | Driver Side Air Outlet Damper COOL Control Servo Motor Circuit |
| B1454/54 | Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit |
| B1455/55 | Driver Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit |
| B1456/56 | Passenger Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit |
| B1457/57 | Driver Side Air Outlet Damper Control Servo Motor Circuit |
| B1458/58 | Passenger Side Air Outlet Damper Control Servo Motor Circuit |
| B1459/59 | Max Hot Bypass Damper HOT Control Circuit |
| B1468/68 | Rear Passenger Side Room Temperature Sensor Circuit |
| B1469/69 | Infrared Rays Sensor Circuit |
| B1486/86 | Driver Side Air Outlet Damper Control Servo Motor Circuit |
| B1487/87 | Passenger Side Air Outlet Damper Control Servo Motor Circuit |
| B1489/89 | Rear Air Outlet Damper Control Servo Motor RH Circuit |
| B1492/92 | Infrared Rays Sensor Communication Malfunction |
| B1493/93 | Max Hot Bypass Damper COOL Control Circuit |
| B1494/94 | Rear Emission Servo Motor Circuit |
| B1495/95 | Rear Diffuse Servo Motor Circuit |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.