Code Definition

C1277 — Steering Wheel Angle 1 and 2 Circuit Failure

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

About C1277

C1277 is a manufacturer-specific chassis diagnostic trouble code recorded for Ford vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C1277 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.

C1277 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 or chassis control module uses the steering wheel angle sensor (SAS) to determine driver steering input for stability control, traction control, and electric power steering coordination. The sensor provides two redundant analogue or digital signals (angle 1 and angle 2) that should track each other with a fixed offset for cross checking. DTC C1277 sets when the module loses or detects an invalid signal from both angle channels simultaneously, indicating a power supply failure to the sensor, both signal wires faulty, or an internal sensor failure. When this code is active stability cont...

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