C1193
Speed Wheel Sensor RF Input Short Circuit To Ground
Chassis Chassis/Safety ABS wheel speed sensor 🔴 Serious — Stop or limit driving
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What This Actually Means
In plain language — no jargon

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.

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Symptoms You May Notice
3 known symptoms for this code
ABS warning light illuminated on dashboard
Traction control or stability control disabled or malfunctioning
Uneven or poor braking performance
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Embedded Systems Insight
What the ECU/ECM is actually computing

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.

Voltage & Parameter Thresholds

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)
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wheel speed sensor wiring harness
Inspect the harness connector and wiring at the right front wheel for damage, moisture, or corrosion and reseat the connector firmly.
2
Right front wheel speed sensor
Unbolt and replace the sensor at the wheel hub if wiring appears intact but continuity to ground persists.
3
ABS module wiring harness
Check for damaged insulation or pinched wires in the harness running from the wheel sensor to the ABS module under the vehicle.