C0515: Right Rear Wheel Speed Sensor Circuit High

What it means

The module detects a right-rear wheel-speed sensor signal above the expected range. This indicates an electrical signal fault; the code alone does not establish that other vehicle functions are disabled.

At a glance

• Usually lights the ABS or stability-control warning light
• The engine or gearbox may go into limp mode

How it works

The ABS module monitors the right-rear wheel-speed sensor circuit while the sensor reports wheel rotation. It sets C0515 when the electrical signal is higher than expected, which may point to a signal wire shorted to power or another circuit fault.

Common causes

Most likely first.

1. Signal wire shorted to power
2. Open or damaged wiring
3. Damaged connector
4. Faulty wheel-speed sensor

Symptoms

• ABS warning light on
• ESC/stability control deactivated
• Possible reduced brake assist
• Speedometer may behave erratically

How to diagnose it

1. Review freeze-frame data and live wheel-speed readings to see whether the right-rear signal is implausible or missing while the other wheels read normally.
2. Inspect the right-rear sensor connector for damaged pins, corrosion, moisture, or a poor connection.
3. Follow the right-rear sensor wiring and look for damaged insulation or contact with a powered wire.
4. Test the right-rear circuit for a short to power or an open, using the wiring diagram and manufacturer’s specifications.
5. If the wiring is sound, test the right-rear sensor and inspect the tone ring or encoder for damage.

Common fixes

• Repair loose, corroded, or damaged terminals at the right-rear sensor connector.
• Repair an open or short to power in the right-rear sensor wiring.
• Replace a faulty right-rear wheel-speed sensor.
• Repair or replace a damaged right-rear tone ring or encoder.

Can I keep driving?

ABS or stability control may be disabled while the right-rear signal is faulty. Use extra caution, leave more stopping distance, and avoid slippery roads until the circuit is repaired.