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.
2004 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
HVAC DTCS
HVAC DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| B1411 | ROOM TEMPERATURE SENSOR CIRCUIT |
| B1412 | AMBIENT TEMPERATURE SENSOR CIRCUIT |
| B1413 | EVAPORATOR TEMPERATURE SENSOR CIRCUIT |
| B1415 | AIR DUCT SENSOR CIRCUIT (DRIVER SIDE) |
| B1416 | AIR DUCT SENSOR CIRCUIT (PASSENGER SIDE) |
| B1418 | EMISSION GAS SENSOR CIRCUIT |
| B1421 | SOLAR SENSOR CIRCUIT (PASSENGER SIDE) |
| B1423 | PRESSURE SWITCH CIRCUIT |
| B1424 | SOLAR SENSOR CIRCUIT (DRIVER SIDE) |
| B1428 | REAR SOLAR SENSOR CIRCUIT |
| B1432 | AIR INLET DAMPER POSITION SENSOR CIRCUIT |
| B1434 | MAX COOL DAMPER POSITION SENSOR CIRCUIT (DRIVER SIDE) |
| B1435 | MAX COOL DAMPER POSITION SENSOR CIRCUIT (PASSENGER SIDE) |
| B1442 | AIR INLET DAMPER CONTROL SERVOMOTOR CIRCUIT |
| B1451 | COMPRESSOR SOLENOID CIRCUIT |
| B1461 | EMISSION 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.