This code indicates that the Anti-lock Brake System (ABS) control module has detected a lower-than-expected voltage or signal from the right rear wheel speed sensor. A circuit low condition typically points to a short to ground, high resistance in the wiring, or a failed sensor, which prevents the system from accurately reading that wheel's speed.
An internal short or open circuit within the sensor itself is the most common cause, preventing it from generating a proper signal.
Corroded, chafed, or shorted wiring to ground reduces the signal voltage reaching the control module.
A cracked, missing, or debris-filled tone ring disrupts the magnetic field, causing a weak or erratic signal.
On vehicles with magnetic encoder wheel bearings, a degraded or rusted bearing can fail to generate a proper signal.
An internal fault in the module could misinterpret the sensor signal as a low voltage condition, though this is rare.
Yes, the vehicle remains drivable, but the ABS and traction control systems will be disabled, meaning you could lose stability control and anti-lock braking during an emergency stop.
Almost never. This code is overwhelmingly caused by a failed sensor, damaged wiring, or a broken tone ring. Replacing the control module is a common misdiagnosis and will not resolve the issue.
It means the control module is seeing a voltage drop or a lack of signal return from the sensor circuit, which is most often caused by a short to ground, high resistance, or an open circuit.
Yes, on some vehicles the wheel speed sensor reads a magnetic encoder built into the wheel bearing rather than a separate tone ring. If the bearing rusts or degrades, the signal weakens, triggering a low circuit code.