What Does C1264 Mean?
The ABS module has detected a malfunction in the right front outlet (dump) valve solenoid. This valve is responsible for releasing hydraulic pressure from the right front brake caliper during ABS cycling. A failure here means the ABS cannot release pressure on the right front wheel, which could cause it to lock during ABS-controlled braking.
Common Causes
40%
Failed right front outlet valve solenoid in the ABS hydraulic modulator
25%
Internal wiring fault in the ABS module outlet valve driver circuit
20%
Contaminated brake fluid causing valve to stick closed
10%
ABS module electronic driver circuit failure
5%
Poor ABS module ground affecting solenoid drive capability
Diagnostic Steps
1
Using bi-directional scan tool commands, actuate the right front outlet valve solenoid and listen for operation at the ABS hydraulic unit.
2
Measure outlet solenoid coil resistance at the module connector — expect 3-6 ohms. Infinite or near-zero readings indicate a solenoid coil failure.
3
Check ABS module power and ground integrity. Measure voltage drop across the ground circuit under load — should be less than 100 mV.
4
Inspect brake fluid for contamination, moisture content, and age. Flush and bleed the system with fresh DOT-rated fluid if the fluid is degraded.
5
If electrical tests pass and fluid is fresh but the code persists, the valve is mechanically stuck and the ABS modulator assembly must be replaced.
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The ABS module has detected a malfunction in the right front outlet (dump) valve solenoid. This valve is responsible for releasing hydraulic pressure from the right front brake caliper during ABS cycling. A failure here means the ABS cannot release pressure on the right front wheel, which could caus...
The most common cause of C1264 (Right Front Outlet Valve Solenoid Malfunction) is: Failed right front outlet valve solenoid in the ABS hydraulic modulator
Typical repair costs for C1264 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The ABS cannot release brake pressure on the right front wheel during anti-lock cycling. This could cause the right front wheel to lock during hard braking on low-traction surfaces. Normal braking is unaffected. Drive cautiously and repair promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1264 to identify the root cause.
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Quick Info
Category
Chassis
System
ABS / Traction Control
Difficulty
Type
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