OBD-II Fault Code

C1955: Steering Angle Sensor Circuit Open

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for C1955.

System family

Chassis

Manufacturer-specific

Repair category

Steering system

Use this category to narrow your checks before replacing parts.

Severity

High

Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.

What C1955 usually means

Steering Angle Sensor Circuit Open.

Common symptoms

ABS/traction/steering/suspension warning lamp or abnormal chassis behaviour; Steering warning lamp or heavy/abnormal steering

Likely causes

Low voltage; Steering angle/torque sensor fault; Power steering motor/module issue; Wiring fault; Open circuit; Disconnected connector; Broken wire; Failed component

Diagnostic checks

Inspect wheel/brake/suspension area, connectors, sensor wiring and module power/ground; Check battery/charging system; Calibrate steering angle sensor if required after repair/alignment; Check connector fitment and continuity from module to component

Repair guidance

Repair wiring/power supply, perform calibration, replace failed sensor/module after confirmation; Repair open wire/connector or replace the failed component after continuity test

Verification after repair

Clear code, road-test safely at low speed first, then rescan

Note: Confirm vehicle make/model/year because manufacturer-specific codes can vary; Manufacturer-specific: confirm definition and test steps in the vehicle service manual. A DTC identifies a circuit or system condition, not always the failed part.