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.
2001 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
HVAC DTCS
HVAC DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| B1411/11 | In-Vehicle Temperature Sensor Circuit |
| B1412/12 | Ambient Air Temperature Sensor Circuit |
| B1413/13 | Evaporator Temperature Sensor Circuit |
| B1415/15 | Driver Duct Temperature Sensor Circuit |
| B1416/16 | Passenger Side Duct Temperature Sensor Circuit |
| B1418/18 | Exhaust Gas (HC & CO) Sensor Circuit |
| B1421/21 | Passenger Side Solar Sensor Circuit |
| B1422/22 | Compressor Lock Sensor Circuit |
| B1423/23 | Pressure Switch Circuit |
| B1424/24 | Driver Side Solar Sensor Circuit |
| B1428/28 | Rear Solar Sensor Circuit (With Rear A/C) |
| B1432/32 | Air Inlet Door Position Sensor Circuit |
| B1434/34 | Driver Cool Air By-Pass Door Position Sensor Circuit |
| B1435/35 | Passenger Side Cool Air By-Pass Door Position Sensor Circuit |
| B1442/42 | Air Inlet Door Servomotor Position Sensor |
| B1451/51 | Solenoid Of Externally Changeable Compressor Circuit |
| B1461/61 | Exhaust Gas (NOx) Sensor Circuit |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.