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.
2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Cruise Control DTCS
CRUISE CONTROL DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| P0500/21 | Vehicle Speed Sensor "A" |
| P0503/23 | Vehicle Speed Sensor "A" Intermittent/Erratic/High |
| P0571/52 | Brake Switch "A" Circuit |
| P0607/54 | Control Module Performance |
| P1570/73 | Laser Radar Sensor Malfunction |
| P1572/75 | Improper Aiming Of Laser Radar Sensor Beam Axis |
| P1575/68 | Warning Buzzer Malfunction |
| P1576/67 | Steering Angle Sensor Malfunction |
| P1577/68 | Yaw Rate Sensor Malfunction |
| P1578/69 | Brake System Malfunction |
| P1615/61 | Communication Error From Distance Control ECU To ECM |
| P1616/62 | Communication Error From ECM To Distance Control ECU |
| P1617/63 | Distance Control ECU Malfunction |
| U0100/65 | Communication Error From ECM to Skid Control LEGU |
| U0122/64 | Communication Error From Skid Control ECU to ECM |
| U0235/72 | Communication Error 2 From Distance Control ECU to Laser Radar Sensor |
| U9235/71 | Communication Error 1 From Laser Radar Sensor to Distance Control ECU |
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.
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