Steering Phase B Circuit Signal Is Not Sensed
Your car's steering control system isn't receiving a signal from one of its position sensors—think of it like a GPS losing signal and not knowing where it's pointing. The ECU can't properly monitor steering angle changes needed for stability and safety systems.
The ECU monitors the steering angle position sensor (Phase B circuit) to detect steering wheel movement and direction. This signal helps the stability control system coordinate braking and engine power. When the Phase B signal voltage drops below minimum threshold or disappears entirely, the ECU logs this fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Phase B Sensor Voltage | 0.5V - 4.5V AC/DC | Below 0.1V or no signal detected |
| Signal Frequency | 10-200 Hz (varies by RPM) | Zero or erratic signal loss |
Code C1442 is classified as a serious fault. If your check engine light is flashing — not just steady — pull over safely and do not continue driving. A flashing CEL indicates an active misfire or critical failure that can cause catalytic converter damage within minutes or permanent engine harm within miles. Contact a certified mechanic immediately. Do not attempt roadside repairs on high-severity codes unless you are trained to do so.
Once the fault is repaired, C1442 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.