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.
2009 Lexus IS FFACTORY OEM SERVICE PROCEDURE
Vehicle Stability Control System
ABS DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C0200/31 | Front Speed Sensor RH Circuit |
| C0205/32 | Front Speed Sensor LH Circuit |
| C0210/33 | Rear Speed Sensor RH Circuit |
| C0215/34 | Rear Speed Sensor LH Circuit |
| C0226/21 | SFR Solenoid Circuit |
| C0236/22 | SFL Solenoid Circuit |
| C0246/23 | SRR Solenoid Circuit |
| C0256/24 | SRL Solenoid Circuit |
| C0273/13 | Open in ABS Motor Relay Circuit |
| C0274/14 | Short to B+ in ABS Motor Relay Circuit |
| C0278/11 | Open in ABS Solenoid Relay Circuit |
| C0279/12 | Short to B+ in ABS Solenoid Relay Circuit |
| C1203/59 | ECM Communication Circuit Malfunction |
| C1225/25 | SM Solenoid Circuit |
| C1235/35 | Foreign Object is Attached on Tip of Front Speed Sensor RH |
| C1236/36 | Foreign Object is Attached on Tip of Front Speed Sensor LH |
| C1238/38 | Foreign Object is Attached on Tip of Rear Speed Sensor RH |
| C1239/39 | Foreign Object is Attached on Tip of Rear Speed Sensor LH |
| C1241/41 | Low Battery Positive Voltage |
| C1243/43 | Acceleration Sensor Stuck Malfunction |
| C1244/44 | Open or Short in Acceleration Sensor Circuit |
| C1245/45 | Acceleration Sensor Output Malfunction |
| C1246/46 | Master Cylinder Pressure Sensor Malfunction |
| C1249/49 | Open in Stop Light Switch Circuit |
| C1251/51 | Open in Pump Motor Circuit |
| C1267/67 | Brake Pedal Load Sensing Switch |
| C1300/62 | Skid Control ECU Malfunction |
| C1336/98 | Zero Point Calibration of Acceleration Sensor Undone |
| C1361/91 | Short Circuit in ABS Motor Fail Safe Relay Circuit |
| C1381/97 | Acceleration Sensor Power Supply Voltage Malfunction |
| U0073/94 | Control Module Communication Bus OFF |
| U0124/95 | Lost Communication with Lateral Acceleration Sensor Module |
VSC DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| 43 | ABS Control System Malfunction |
| C1201/51 | Engine Control System Malfunction |
| C1210/36 | Zero Point Calibration of Yaw Rate Sensor Undone |
| C1231/31 | Steering Angle Sensor Circuit Malfunction |
| C1234/34 | Yaw Rate Sensor Malfunction |
| C1290/66 | Steering Angle Sensor Zero Point Malfunction |
| C1305/21 | Solenoid Identification Circuit |
| C1380/64 | Stop Light Control Relay Malfunction |
| U0100/65 | Lost Communication with ECM / PCM |
| U0123/62 | Lost Communication with Yaw Rate Sensor Module |
| U0126/63 | Lost Communication with Steering Angle Sensor Module |
ABS TEST MODE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1270/88 | Initialization Incomplete (Test Mode DTC) |
| C1271/71 | Low Output Signal of Front Speed Sensor RH (Test Mode DTC) |
| C1272/72 | Low Output Signal of Front Speed Sensor LH (Test Mode DTC) |
| C1273/73 | Low Output Signal of Rear Speed Sensor RH (Test Mode DTC) |
| C1274/74 | Low Output Signal of Rear Speed Sensor LH (Test Mode DTC) |
| C1275/75 | Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC) |
| C1276/76 | Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC) |
| C1277/77 | Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC) |
| C1278/78 | Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC) |
| C1279/79 | Acceleration Sensor Output Voltage Malfunction (Test Mode DTC) |
| C1281/81 | Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) |
VSC TEST MODE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C0371/71 | Yaw Rate Sensor (Test Mode DTC) |
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.