What Does C1401 Mean?
The ABS module has detected an open circuit condition in the right front (RF) traction control valve solenoid wiring. This means there is a break in the electrical path to the solenoid, preventing the module from actuating the valve. Traction control will be disabled, and the warning light will illuminate on the dashboard.
Common Causes
40%
Broken or disconnected wire in the RF traction control solenoid circuit
25%
Corroded or backed-out terminal pins at the HCU connector
20%
Internally open RF traction control solenoid coil
15%
ABS module connector damage or loose connection
Diagnostic Steps
1
Disconnect the ABS HCU connector and measure the RF traction control solenoid resistance at the module-side harness pins — should read 3-6 ohms if the circuit is complete to the solenoid.
2
If open (OL), trace the wiring from the ABS module connector to the solenoid. Look for chafed, cut, or corroded wires, especially where the harness passes near suspension components or sharp edges.
3
Inspect all intermediate connectors in the circuit for backed-out pins, corrosion, or green discoloration. Use a terminal pick to verify pin tension.
4
Measure the solenoid coil resistance directly at the solenoid pins — if open (OL), the solenoid coil has failed internally and the HCU or solenoid assembly must be replaced.
5
Wiggle-test the harness and connectors while monitoring resistance to identify intermittent open connections.
Estimated Repair Cost
$100 - $1,000
Parts + labor, varies by vehicle and location
The ABS module has detected an open circuit condition in the right front (RF) traction control valve solenoid wiring. This means there is a break in the electrical path to the solenoid, preventing the module from actuating the valve. Traction control will be disabled, and the warning light will illu...
The most common cause of C1401 (Traction Control Valve RF Circuit Open) is: Broken or disconnected wire in the RF traction control solenoid circuit
Typical repair costs for C1401 range from $100 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Traction control is inoperative for the right front wheel. Standard braking still functions, but electronic traction assistance is lost. Safe to drive at moderate speeds in good conditions, but reduced traction management in rain, snow, or ice. Schedule repair promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1401 to identify the root cause.
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Quick Info
Category
Chassis
System
ABS / Traction Control
Difficulty
Type
Manufacturer
Recommended Tools
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