Does C1259 mean the steering angle sensor is bad on my Kia Venga?

No. Kia sets C1259 when the control module detects an electrical fault in the SAS circuit. That includes power loss, poor ground, high resistance at terminals, or an intermittent open during steering movement. Confirm the fault with live data, a wiring inspection, and loaded voltage-drop tests before you replace any sensor.

How do I confirm the repair and make sure the code will not come back?

Clear the code only after you correct the root cause. Then road-test while watching steering angle live data. Turn lock-to-lock at low speed and drive straight to confirm stability near center. Drive long enough for the system’s self-check to run. Enable criteria vary by Kia platform, so verify the exact conditions in service information.

Can a weak battery or alternator cause C1259?

Yes. Low system voltage and unstable charging can trigger “electrical fault” logic and create false SAS faults. Check battery state of health and charging output first. Also load-test key grounds and power feeds with voltage-drop checks. If voltage stability fixes the issue, you avoid unnecessary sensor or module work.

Do I need calibration or initialization after fixing a steering angle sensor electrical fault?

Often, yes. Many Kia platforms require SAS zero-point initialization after steering or alignment work, after battery disconnects, or after replacing SAS-related components. Use a scan tool that supports Kia chassis functions to run the procedure. Confirm success by checking that steering angle reads smoothly and centers correctly on a straight road.

Can I clear C1259 and pass inspection right away?

This chassis code does not follow OBD-II readiness monitor rules like emissions powertrain codes. Even so, clearing it can hide an active safety fault and the warning lamps may return quickly. Focus on verifying ESC/ABS operation and stable SAS data. If your area checks warning lamps, an active ESC/ABS light can still fail you.

C1259 Kia – Steering angle sensor (SAS) electrical fault

C1101 Battery voltage high
C1102 Battery voltage low
C1200 Left front vehicle speed sensor circuit open/short
C1205 Right front wheel speed sensor (VSS) invalid / no…
C120D Left warning indicator circuit open or short to battery
C1260 Steering angle sensor (SAS) circuit signal
C1268 Circuit leakage fail
C1283 Lateral G-Sensor/Longitudinal G-Sensor/Yaw rate sensor (YRS) signal error

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