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 GS 300FACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake DTCS
ANTI-LOCK BRAKE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| C0200/31 | Right front wheel speed sensor signal malfunction |
| C0205/32 | Left front wheel speed sensor signal malfunction |
| C0210/33 | Right rear wheel speed sensor signal malfunction |
| C0215/34 | Left rear wheel speed sensor signal malfunction |
| C0226/21 | Open or short circuit in hydraulic brake booster solenoid circuit (SFR circuit) |
| C0236/22 | Open or short circuit in hydraulic brake booster solenoid circuit (SFL circuit) |
| C0246/23 | Open or short circuit in hydraulic brake booster solenoid circuit (SRR circuit) |
| C0256/24 | Open or short circuit in hydraulic brake booster solenoid circuit (SRL circuit) |
| C0278/11 | Open or short circuit in ABS solenoid relay circuit |
| C0279/12 | B+ short circuit in ABS solenoid relay circuit |
| C1225/25 | Open or short circuit in hydraulic brake booster solenoid circuit (SA1 circuit) |
| C1226/26 | Open or short circuit in hydraulic brake booster solenoid circuit (SA2 circuit) |
| C1227/27 | Open or short circuit in hydraulic brake booster solenoid circuit (SA3 circuit) |
| C1228/28 | Open or short circuit in hydraulic brake booster solenoid circuit (STR circuit) |
| C1241/41 | Low battery positive voltage or abnormally high battery positive voltage |
| C1242/42 | Open circuit in IG2 circuit |
| C1243/43 | Malfunction in deceleration sensor (constant output) |
| C1244/44 | Open or short circuit in deceleration sensor circuit |
| C1245/45 | Malfunction in deceleration sensor |
| C1246/46 | Malfunction in master cylinder pressure sensor |
| C1249/49 | Open circuit in stop light switch circuit |
| C1251/51 | Pump motor is locked Open circuit in pump motor ground |
| C1252/52 | Hydro-booster pump motor malfunction |
| C1253/53 | Hydro-booster pump motor relay malfunction |
| C1254/54 | Pressure switch malfunction |
| C1256/56 | Accumulator low pressure malfunction |
| C1257/57 | Power supply drive circuit malfunction |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.