C0059high severityChassis
ABS Isolation Valve Solenoid Circuit
on 2015 Kia Forte 1.8L I4 · FWD
What this code means
Malfunction in the ABS isolation valve solenoid, used to isolate the master cylinder from the ABS modulator.
Symptoms
- ABS light on
- Brake pedal feels unusual
- ABS not functioning
- Pedal sinks during ABS activation
Common causes
- Isolation valve solenoid failure
- ABS module internal fault
- Wiring open or short
- Contaminated brake fluid
Diagnostic steps
- Test solenoid resistance through connector
- Command isolation valve with scan tool
- Check brake fluid condition
- Inspect module connector pins
Repair notes
Replace ABS modulator assembly. Bleed brake system thoroughly.
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0026
RF Wheel Speed Sensor Circuit Intermittent
C0027
LR Wheel Speed Sensor Circuit Intermittent
C0028
RR Wheel Speed Sensor Circuit Intermittent
C0035
Left Front Wheel Speed Sensor Circuit
C0036
Left Front Wheel Speed Signal Erratic