OBD2 Code C1249: RR Outlet Valve Short to Ground
The C1249 code indicates that the ABS control module (HCU) has detected a short-to-ground in the circuit for the right rear (RR) outlet valve solenoid. This valve controls hydraulic pressure during anti-lock braking; a short prevents it from operating, disabling ABS and stability control on that wheel.
1. Commonly Affected Makes
2. Most Common Causes
- Internal short circuit in the RR outlet valve solenoid
- Wiring harness for the RR valve circuit chafed or pinched against the chassis (short to ground)
- Damaged, corroded, or moisture-contaminated connector at the hydraulic control unit (HCU)
- Internal failure of the valve driver within the ABS module (HCU/EBCM)
3. Symptoms You Will Notice
- ABS warning light illuminated
- Stability control warning light on (if equipped)
- ABS and stability control disabled on the right rear wheel
4. Step-by-Step Diagnosis
Scan for codes and verify C1249 is present
Inspect the RR outlet valve circuit wiring and connector for damage, corrosion, or shorts to ground
Measure resistance of the RR outlet valve solenoid; compare to specifications
Check for continuity to ground on the valve control wire with the connector disconnected
If wiring and solenoid are good, suspect a faulty ABS module (HCU/EBCM)
5. Frequently Asked Questions
Is it safe to drive?▼
Driving is possible but not recommended because ABS and stability control are disabled on the right rear wheel, increasing the risk of wheel lockup and loss of control during hard braking or slippery conditions.
How much does it cost to fix?▼
Repair costs typically range from $200 to $800, depending on whether the issue is a simple wiring repair ($200-$400) or requires replacing the ABS module ($500-$800).