Code Definition

C1429 — Input-shaft-speed input circuit failure

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

About C1429

C1429 is a manufacturer-specific chassis diagnostic trouble code. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C1429 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

C1429 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 C1429 fault code indicates the transmission control module or chassis control module has detected a fault on the input shaft speed sensor circuit. The input shaft speed sensor (also called turbine speed sensor on torque converter equipped vehicles) measures the rotational speed of the transmission input shaft and reports this back to the control module for use in shift timing, torque converter clutch control, and slip calculation. The sensor typically uses a hall effect or variable reluctance signal proportional to shaft speed. This code is set when the module detects no signal, an out of ...

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