Code C0115 on the 2023 Kia Sorento points to a problem in the front right ABS solenoid valve circuit. These precision electromagnetic valves are essential components of the ABS hydraulic modulator, controlling brake pressure delivery during anti-lock braking activation.
ABS Valve Operation
The Sorento's ABS system uses pairs of solenoid valves for each wheel circuit. During an ABS event, the control module rapidly opens and closes these valves to reduce, hold, and restore brake pressure at rates up to 15 times per second. The front right solenoid manages one of the primary braking circuits, as front brakes handle 60-70% of stopping force.
Observable Symptoms
With C0115 active, the ABS and ESC warning lights will illuminate on the instrument panel. The Sorento's brake system will function normally for regular stops, but ABS intervention at the front right wheel will be compromised during emergency braking. You may notice uneven braking behavior if ABS activates.
Diagnosis Path
Start diagnosis by confirming the code and checking for related faults. Electrical issues are the most common cause - connector problems, wiring damage, or internal module faults. Use a scan tool with bidirectional capability to actuate the solenoid and verify operation. The distinctive clicking sound confirms electrical operation, though it doesn't guarantee proper hydraulic function.
Resolution Options
Many solenoid circuit codes result from connector or wiring issues that can be repaired. However, if the solenoid valve itself has failed internally, the ABS modulator assembly requires replacement. This is a significant repair involving brake hydraulic work and should include a complete brake fluid flush.