What Does C1402 Mean?
The ABS module has detected a short-to-ground condition in the right front (RF) traction control valve solenoid circuit. This means the solenoid circuit wiring is making unintended contact with the vehicle chassis or ground, which can cause the solenoid to activate unexpectedly or blow internal fuses. The traction control system will be disabled.
Common Causes
40%
Chafed or damaged wire insulation contacting chassis or body metal
25%
Water intrusion causing corrosion and short circuit in connector
20%
Internally shorted RF traction control solenoid coil to case ground
15%
Damaged ABS module internal driver circuit pulling line low
Diagnostic Steps
1
Disconnect the ABS HCU connector. Measure resistance from each RF traction control solenoid circuit pin to chassis ground — should read OL (open). Any low resistance reading confirms a short to ground.
2
If shorted, disconnect the solenoid at the valve end. Re-measure at the module connector to isolate whether the short is in the harness or the solenoid itself.
3
If the short is in the harness, visually inspect the entire wiring run for chafing, pinching, or insulation damage. Pay close attention to areas near the subframe, suspension components, and body panel edges.
4
If the short is at the solenoid, measure resistance from each solenoid pin to the solenoid case — should be OL. A low reading means the solenoid coil is shorted to its housing.
5
Repair damaged wiring with proper weatherproof splice connectors and protective loom. Re-route wiring away from abrasion points.
Estimated Repair Cost
$100 - $1,100
Parts + labor, varies by vehicle and location
The ABS module has detected a short-to-ground condition in the right front (RF) traction control valve solenoid circuit. This means the solenoid circuit wiring is making unintended contact with the vehicle chassis or ground, which can cause the solenoid to activate unexpectedly or blow internal fuse...
The most common cause of C1402 (Traction Control Valve RF Circuit Short To Ground) is: Chafed or damaged wire insulation contacting chassis or body metal
Typical repair costs for C1402 range from $100 to $1,100, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Traction control is disabled. A short-to-ground could potentially cause unintended partial brake application on the right front wheel in rare cases. Drive cautiously and avoid harsh acceleration on low-traction surfaces. Repair soon to restore full safety system functionality.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1402 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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