Speed Wheel Sensor RF Input Short Circuit To Ground
The right front wheel speed sensor is shorted to ground, meaning its electrical signal wire is touching the vehicle's ground/chassis and can't send proper speed data. It's like a phone line that's been cut and touching the ground instead of transmitting your message.
The ECU monitors the AC voltage signal from the right front wheel speed sensor, which should oscillate between specific voltage levels as the wheel rotates. When shorted to ground, the sensor produces either zero voltage or an abnormal DC signal instead of the expected AC waveform, triggering a fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| RF Wheel Speed Sensor Voltage | 0.2 to 5V AC (oscillating with wheel rotation) | Continuous 0V or DC short to ground detected |
| Signal Resistance | 800 to 900 ohms typical coil resistance | Less than 10 ohms (short circuit path to ground) |
Code C1193 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, C1193 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.