ABS Outlet Valve Circuit RR Fault
The C1246 code indicates a fault in the ABS outlet valve solenoid circuit for the right rear wheel. This valve is part of the ABS hydraulic control module and modulates brake pressure during emergency braking. The ABS module detects an open circuit, short circuit, or abnormal resistance in the solenoid coil, preventing proper pressure control. As a safety measure, the system disables ABS, traction control, and vehicle stability control.
1. Commonly Affected Makes
2. Most Common Causes
- Open or shorted right rear ABS outlet valve solenoid coil
- Damaged wiring or connectors between the ABS module and the RR outlet valve
- Corrosion at the ABS hydraulic control module connector pins
- Internal failure of the ABS hydraulic control module (damaged solenoid valve)
- Excessive circuit resistance due to loose connections or poor splices
3. Symptoms You Will Notice
- ABS warning light illuminated on the dashboard
- Traction control and stability control warning lights on
- ABS, traction control, and stability control systems disabled
- Possible loss of ABS function during hard braking
4. Step-by-Step Diagnosis
Scan the ABS module for codes and confirm C1246 is present
Visually inspect the right rear ABS valve wiring and connector for damage or corrosion
Measure resistance between the ABS module connector pins for the RR outlet valve; expected range is 0.8–1.6 ohms
Check for continuity and shorts to ground or power in the wiring harness
If wiring is good, test the solenoid valve directly at the hydraulic control module; if out of spec, replace the module
5. Frequently Asked Questions
Is it safe to drive?▼
You can still drive, but without ABS, traction control, or stability control. Braking on slippery surfaces may cause wheel lockup, increasing the risk of skidding. Have it repaired as soon as possible.
How much does it cost to fix?▼
Repair costs typically range from $200 to $800, depending on the cause. A simple wiring repair may cost $200–$400, while replacing the ABS hydraulic control module can run $500–$800 or more.