What Does C1249 Mean?
The ABS control module has detected a short to ground on the right rear ABS outlet valve coil circuit. The valve coil driver circuit has an unintended low-resistance path to vehicle ground, preventing normal valve control. This disables ABS pressure release capability at the right rear wheel position.
Safety Warning
ABS outlet valve is disabled at the right rear wheel. Wheel lockup during hard braking on slippery surfaces is likely at this corner. Repair before continued driving.
Common Causes
35%
Right rear outlet valve coil winding shorted to the grounded valve body inside the hydraulic modulator
25%
Pinched or chafed internal wiring contacting a ground plane inside the ABS module housing
25%
Brake fluid or moisture intrusion into the module creating a conductive ground path
15%
Corroded module-to-modulator connector with grounding through corrosion deposits
Diagnostic Steps
1
Step 1: Separate the ABS electronic module from the hydraulic modulator. Measure resistance from each right rear outlet valve coil terminal to the modulator body ground. Less than 10K ohms indicates coil-to-ground short.
2
Step 2: On the module side, measure resistance from the corresponding connector pins to module ground. This determines if the short is in the module electronics.
3
Step 3: Inspect the mating surfaces between the module and modulator for brake fluid residue, which indicates seal failure and fluid contamination of electronics.
4
Step 4: Check for corrosion or moisture damage on the module circuit board near the right rear valve driver components.
5
Step 5: Replace the failed component (modulator or module). Perform complete ABS bleed procedure. Clear codes and perform bidirectional valve test to confirm all valves operate.
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
The ABS control module has detected a short to ground on the right rear ABS outlet valve coil circuit. The valve coil driver circuit has an unintended low-resistance path to vehicle ground, preventing normal valve control. This disables ABS pressure release capability at the right rear wheel positio...
The most common cause of C1249 (ABS Outlet Valve Coil RR Circuit Short To Ground) is: Right rear outlet valve coil winding shorted to the grounded valve body inside the hydraulic modulator
Typical repair costs for C1249 range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
ABS outlet valve is disabled at the right rear wheel. Wheel lockup during hard braking on slippery surfaces is likely at this corner. Repair before continued driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1249 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS)
Difficulty
Type
Manufacturer
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