What Does C1424 Mean?
The suspension control module has detected an open circuit in the left front (LF) electronically controlled damper circuit. A break in the electrical path prevents the module from energizing the LF damper actuator. The adaptive ride system defaults the LF damper to a fixed setting, and the suspension warning light will illuminate.
Common Causes
40%
Broken or disconnected wire in the LF damper circuit, often at the body-to-suspension flex point
25%
Corroded or backed-out terminal pins in the LF damper connector
20%
Internally open LF damper actuator coil
15%
Suspension module connector damage or unseated connection
Diagnostic Steps
1
Disconnect the suspension module connector and measure the LF damper circuit resistance at the harness pins — should read 1-5 ohms if the circuit is complete to the actuator.
2
If open (OL), disconnect the LF damper actuator at the shock absorber. Measure coil resistance directly — OL means the coil is burned open and the damper/actuator must be replaced.
3
If the coil is good, perform a wire-by-wire continuity test from the module connector to the damper connector to locate the break.
4
Focus inspection on the flex point where the harness transitions from the body to the suspension strut — this area endures constant movement and is the most common wire fatigue failure point.
5
After repair, verify circuit resistance end-to-end, clear codes, and test the adaptive suspension in all modes to confirm proper LF damper response.
Estimated Repair Cost
$100 - $900
Parts + labor, varies by vehicle and location
The suspension control module has detected an open circuit in the left front (LF) electronically controlled damper circuit. A break in the electrical path prevents the module from energizing the LF damper actuator. The adaptive ride system defaults the LF damper to a fixed setting, and the suspensio...
The most common cause of C1424 (Damper LF Circuit Open) is: Broken or disconnected wire in the LF damper circuit, often at the body-to-suspension flex point
Typical repair costs for C1424 range from $100 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The LF damper is stuck in a fixed default mode. Ride and handling are slightly degraded. Safe to drive under normal conditions. Schedule repair for optimal ride comfort and handling performance.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1424 to identify the root cause.
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Quick Info
Category
Chassis
System
Suspension / Ride Control
Difficulty
Type
Manufacturer
Recommended Tools
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