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Toyota C1234 Code – ABS Front Left Wheel Sensor Fault
Limited
Safe to drive :
Toyota vehicles only
Applies only to :
Not applicable to :
This explanation does NOT apply to other brands.
Medium
Severity level :
When Does This Code Appear on the Vehicles
Toyota C1234 occurs when ABS module detects wheel speed sensor fault.
What This Code means on the Vehicles
Toyota-specific ABS warning related to front left wheel speed sensor.
Why This is different from a generic OBD2 Code
Generic OBD-II scanners report ABS sensor fault, but not Toyota-specific module logic.
Common Situations That Trigger This Code
Faulty sensor; Wiring harness damage; Corroded connectors.
What Will NOT Fix This Code
Replacing unrelated ABS components.
How to Clear This Code on Vehicles
Inspect sensor and wiring; clear code using Techstream.
Related Manufacturer Specific Codes
Toyota C1235; Toyota C1236
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