What Does C1246 Mean?
The ABS control module has detected a circuit failure in the right rear ABS outlet valve coil. The outlet valve is responsible for releasing brake hydraulic pressure at the right rear wheel during ABS events. A coil circuit failure means the module cannot command this pressure release, disabling ABS function for this wheel position.
Safety Warning
Right rear ABS outlet valve is inoperative. ABS pressure release at this wheel is disabled, increasing the risk of wheel lockup during emergency braking. Schedule immediate repair.
Common Causes
40%
Failed right rear outlet valve coil inside the ABS hydraulic control unit from thermal stress or internal short
25%
Corroded or broken internal wiring between ABS electronic module and hydraulic modulator valve coils
20%
ABS control module circuit board failure on the right rear outlet valve driver transistor
15%
Brake fluid contamination inside the modulator assembly damaging valve coil insulation
Diagnostic Steps
1
Step 1: Measure right rear outlet valve coil resistance at the ABS module connector (typical 3-6 ohms). Compare to left rear outlet valve for reference. Out-of-spec reading confirms coil fault.
2
Step 2: Check for short to ground and short to battery on both valve circuit wires. All readings should be OL (open loop).
3
Step 3: Inspect the ABS modulator assembly for external signs of brake fluid leakage, corrosion, or impact damage.
4
Step 4: Use a bidirectional scan tool to command the right rear outlet valve. Listen for the solenoid click. No click with good resistance indicates a mechanical failure.
5
Step 5: Replace the ABS hydraulic modulator or electronic module as indicated by testing. Perform a complete ABS brake bleed after replacement. Clear codes and test drive.
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
The ABS control module has detected a circuit failure in the right rear ABS outlet valve coil. The outlet valve is responsible for releasing brake hydraulic pressure at the right rear wheel during ABS events. A coil circuit failure means the module cannot command this pressure release, disabling ABS...
The most common cause of C1246 (ABS Outlet Valve Coil RR Circuit Failure) is: Failed right rear outlet valve coil inside the ABS hydraulic control unit from thermal stress or internal short
Typical repair costs for C1246 range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Right rear ABS outlet valve is inoperative. ABS pressure release at this wheel is disabled, increasing the risk of wheel lockup during emergency braking. Schedule immediate repair.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1246 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS)
Difficulty
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