What Does C1245 Mean?
The ABS control module has detected a short to ground on the left rear ABS outlet valve coil circuit. The valve driver circuit is seeing near-zero resistance to ground, indicating the coil winding or wiring is making unintended contact with vehicle ground. This prevents normal valve operation and disables ABS at this wheel.
Safety Warning
ABS outlet valve is non-functional due to the ground short. The left rear wheel may lock during hard braking, particularly on wet or loose surfaces. Repair immediately.
Common Causes
35%
Outlet valve coil winding shorted to the valve body/ground inside the ABS hydraulic modulator from moisture intrusion
25%
Pinched or chafed wiring between the ABS module and hydraulic unit contacting a grounded metal surface
25%
Brake fluid or moisture contamination inside the ABS module causing conductive paths to ground
15%
Corroded connector between the ABS electronic module and hydraulic modulator creating ground paths
Diagnostic Steps
1
Step 1: Disconnect the ABS module from the hydraulic unit. Measure resistance from each outlet valve coil terminal to ground on the hydraulic unit side. Less than 10K ohms indicates a ground short in the coil.
2
Step 2: Measure resistance from each valve coil wire to ground at the ABS module connector. If shorted, the fault is in the module internal wiring.
3
Step 3: Inspect the ABS module and hydraulic unit mating surface for brake fluid seepage, which can short internal circuitry to the grounded valve body.
4
Step 4: Check for signs of water intrusion or corrosion inside the ABS module housing that could cause circuit-to-ground shorts.
5
Step 5: Replace the shorted component. After replacement, perform a full ABS brake bleed procedure. Clear codes and test drive to verify ABS function.
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 left rear ABS outlet valve coil circuit. The valve driver circuit is seeing near-zero resistance to ground, indicating the coil winding or wiring is making unintended contact with vehicle ground. This prevents normal valve operation and di...
The most common cause of C1245 (ABS Outlet Valve Coil LR Circuit Short To Ground) is: Outlet valve coil winding shorted to the valve body/ground inside the ABS hydraulic modulator from moisture intrusion
Typical repair costs for C1245 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 non-functional due to the ground short. The left rear wheel may lock during hard braking, particularly on wet or loose surfaces. Repair immediately.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1245 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS)
Difficulty
Type
Manufacturer
Recommended Tools
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