Code Definition

C1343 — Front Speed Sensor RH Circuit

System: Chassis  |  Type: Manufacturer-Specific  |  Make: Lexus

About C1343

C1343 is a manufacturer-specific chassis diagnostic trouble code recorded for Lexus vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C1343 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

C1343 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The ABS/VSC ECU monitors the right-hand front wheel speed sensor signal to calculate wheel speed for anti-lock braking, traction control, and vehicle stability functions. DTC C1343 is stored when the ECU detects an abnormal condition in the sensor circuit, such as no signal, an implausible signal compared to other wheel speeds, or a voltage condition outside the specified range for a calibrated period while the vehicle is in motion. This indicates the ECU cannot reliably determine right-front wheel speed.

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