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.
2012 Lexus LS 460L RWDFACTORY OEM SERVICE PROCEDURE
Smart Access System With Push-Button Start
SMART ACCESS SYSTEM WITH PUSH-BUTTON START DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B2271 | Ignition Hold Monitor Malfunction |
| B2272 | Ignition 1 Monitor Malfunction |
| B2273 | Ignition 2 Monitor Malfunction |
| B2274 | ACC Monitor Malfunction |
| B2275 | STSW Monitor Malfunction |
| B2276 | ACCR Signal Circuit Malfunction |
| B2277 | Detecting Vehicle Submersion |
| B2278 | Engine Switch Circuit Malfunction |
| B2281 | "P" Signal Malfunction |
| B2282 | Vehicle Speed Signal Malfunction |
| B2283 | Vehicle Speed Sensor Malfunction |
| B2284 | Brake Signal Malfunction |
| B2285 | Steering Lock Position Signal Circuit Malfunction |
| B2286 | Runnable Signal Malfunction |
| B2288 | Steering Lock Signal Circuit Malfunction |
| B2289 | Key Collation Waiting Time Over |
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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