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.
2011 Lexus GS 450hFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Table
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| DTC No. | Detection Item | Trouble Area | Reference |
|---|---|---|---|
| B2271 | Ignition Hold Monitor Malfunction | - Power source control ECU - AM2 fuse - Wire harness |
Refer to DTC B2271: Ignition Hold Monitor Malfunction |
| B2272 | Ignition 1 Monitor Malfunction | - Power source control ECU - Wire harness |
Refer to DTC B2272: Ignition 1 Monitor Malfunction |
| B2273 | Ignition 2 Monitor Malfunction | - Power source control ECU - IG2 relay - Wire harness |
Refer to DTC B2273: Ignition 2 Monitor Malfunction |
| B2274 | ACC Monitor Malfunction | - Power source control ECU - Wire harness |
Refer to DTC B2274: ACC Monitor Malfunction |
| B2275 | STSW Monitor Malfunction | - Power source control ECU - Hybrid control system - Wire harness |
Refer to DTC B2275: STSW Monitor Malfunction |
| B2277 | Detecting Vehicle Submersion | Power source control ECU | Refer to DTC B2277: Detecting Vehicle Submersion |
| B2278 | Power Switch Circuit Malfunction | - Power source control ECU - Power switch - Wire harness |
Refer to DTC B2278: Power Switch Circuit Malfunction |
| B2281 | "P" Signal Malfunction | - Power source control ECU - Shift lock system - Wire harness |
Refer to DTC B2281: "P" Signal Malfunction |
| B2282 | Vehicle Speed Signal Malfunction | - Power source control ECU - Combination meter - Wire harness |
Refer to DTC B2282: Vehicle Speed Signal Malfunction |
| B2283 | Vehicle Speed Sensor Malfunction | - Power source control ECU - Combination meter - Speed sensor - Skid control ECU - Wire harness |
Refer to DTC B2283: Vehicle Speed Sensor Malfunction |
| B2284 | Brake Signal Malfunction | - Power source control ECU - Stop light switch - Lighting system - Wire harness |
Refer to DTC B2284: Brake Signal Malfunction |
| B2285 | Steering Lock Position Signal Circuit Malfunction | - Power source control ECU - Electric steering lock - Wire harness |
Refer to DTC B2285: Steering Lock Position Signal Circuit Malfunction |
| B2286 | Runnable Signal Malfunction | - Power source control ECU - Hybrid control system - Wire harness |
Refer to DTC B2286: Runnable Signal Malfunction |
| B2287 | LIN Communication Master Malfunction | - Power source control ECU - Certification ECU - Wire harness |
Refer to DTC B2287: LIN Communication Master Malfunction |
| B2288 | Steering Lock Signal Circuit Malfunction | - Power source control ECU - Electric steering lock - Wire harness |
Refer to DTC B2288: Steering Lock Signal Circuit Malfunction |
| B2289 | Key Collation Waiting Time Over | - Power source control ECU - Entry function - Engine immobilizer system - Power switch - Key - Wire harness |
Refer to DTC B2289: Key Collation Waiting Time Over |
NOTE:
- Check the connector connection to the terminal to make sure that there is no abnormally such as a loose connection, deformations, etc.
- Make sure that the power supply to the ECU and connection of the body ground are normal (DTC B2271 is not output).
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.