What Does C1193 Mean?
The right front wheel speed sensor input circuit is shorted to ground. The ABS module detects a constant ground-level signal on the RF sensor input, making it impossible to read the right front wheel's rotational speed. ABS, traction control, and stability control are disabled, and the driver will see the corresponding warning lights.
Safety Warning
ABS and stability control are disabled. The right front wheel handles substantial braking force, and losing ABS on this corner increases stopping distance and the risk of wheel lockup. Drive carefully and avoid aggressive braking until repaired.
Common Causes
35%
Sensor wiring chafed against the steering knuckle, control arm, or subframe and grounding to chassis
25%
RF wheel speed sensor housing cracked, allowing moisture and direct ground contact through the mounting surface
20%
Water-filled or corroded connector creating a low-resistance ground path
15%
Damaged insulation from salt, road grime, or heat exposure in the wheel well
5%
ABS module input circuit grounded internally
Diagnostic Steps
1
Disconnect the RF wheel speed sensor at the knuckle. Clear codes. If the code changes to a general failure or open circuit code, the sensor is internally shorted to its case ground — replace the sensor.
2
With the sensor disconnected, measure resistance from each harness connector pin to chassis ground. Should be OL (infinite). A reading near 0 ohms identifies which wire is grounded in the harness.
3
Inspect the RF sensor wiring routing carefully. Turn the steering wheel to full lock in both directions and check for contact points between the harness and metal components. The wires flex with steering and suspension travel.
4
Look for previous repairs with inferior splicing methods (twisted wires, electrical tape) that may have degraded, especially in the harsh wheel well environment. Proper repairs require sealed heat-shrink connectors.
5
If no external fault is found, measure resistance from the ABS module connector RF sensor pins to ground. If shorted at the module connector with the entire harness disconnected, the module input is failed.
Estimated Repair Cost
$50 - $350
Parts + labor, varies by vehicle and location
The right front wheel speed sensor input circuit is shorted to ground. The ABS module detects a constant ground-level signal on the RF sensor input, making it impossible to read the right front wheel's rotational speed. ABS, traction control, and stability control are disabled, and the driver will s...
The most common cause of C1193 (Speed Wheel Sensor RF Input Short Circuit To Ground) is: Sensor wiring chafed against the steering knuckle, control arm, or subframe and grounding to chassis
Typical repair costs for C1193 range from $50 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
ABS and stability control are disabled. The right front wheel handles substantial braking force, and losing ABS on this corner increases stopping distance and the risk of wheel lockup. Drive carefully and avoid aggressive braking until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1193 to identify the root cause.
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Quick Info
Category
Chassis
System
ABS / Traction Control
Difficulty
Type
Manufacturer
Recommended Tools
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