What Does C1180 Mean?
The park brake valve solenoid #1 sense input circuit has a general failure. This solenoid controls hydraulic pressure to the parking brake on vehicles with hydraulic electronic parking brake systems. The ABS module cannot read the solenoid's feedback signal, so it cannot confirm whether the parking brake is being applied or released hydraulically. The parking brake warning light will illuminate and the electronic parking brake may not function.
Common Causes
35%
Faulty park brake valve solenoid #1 (internal coil or sense circuit failure)
30%
Damaged wiring between the solenoid and the ABS/parking brake module
20%
Corroded or disconnected solenoid connector
15%
ABS hydraulic control unit internal fault affecting the solenoid driver circuit
Diagnostic Steps
1
Check for companion code C1181 (short to ground). If both are present, the issue is more likely wiring or module-related. If only C1180, suspect the solenoid or an open circuit.
2
Locate the park brake valve solenoid #1 on the ABS hydraulic unit. Disconnect the connector and inspect for corrosion, moisture, or brake fluid contamination.
3
Measure solenoid coil resistance across the two pins — typical spec is 3-8 ohms. An OL reading indicates an open coil; significantly low resistance indicates a short. Replace the solenoid if out of spec.
4
With the solenoid disconnected, check for proper voltage supply and ground at the harness connector using a multimeter. The module should provide battery voltage when commanding the solenoid on.
5
If the solenoid and wiring test good, the ABS module's internal sense circuit for solenoid #1 may have failed. This typically requires module replacement or a specialized ABS hydraulic unit repair.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The park brake valve solenoid #1 sense input circuit has a general failure. This solenoid controls hydraulic pressure to the parking brake on vehicles with hydraulic electronic parking brake systems. The ABS module cannot read the solenoid's feedback signal, so it cannot confirm whether the parking ...
The most common cause of C1180 (Park Brake Valve Solenoid #1 Sense Input Circuit Failure) is: Faulty park brake valve solenoid #1 (internal coil or sense circuit failure)
Typical repair costs for C1180 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The electronic parking brake may not apply or release properly. Do not park on steep grades until repaired. If the parking brake is stuck applied, do not drive — have the vehicle towed. If it is stuck released, use wheel chocks when parked. ABS function may also be affected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1180 to identify the root cause.
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Quick Info
Category
Chassis
System
ABS / Electronic Parking Brake
Difficulty
Type
Manufacturer
Recommended Tools
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