What Does C1908 Mean?
The ride control module has detected a short-to-ground in the left rear shock actuator circuit. The control wire is grounded, preventing solenoid operation. The LR shock defaults to its base damping state with no electronic control capability.
Common Causes
40%
Control wire insulation worn through from contact with rear suspension or body metalwork
25%
Internal actuator solenoid short to the shock absorber body
25%
Water intrusion into actuator connector creating a ground path between pins
10%
Pinched wire at a harness retainer or body panel
Diagnostic Steps
1
Step 1: Disconnect the LR actuator and measure resistance from each wire to ground. Below 10k ohms on any wire confirms a ground fault.
2
Step 2: Test solenoid resistance from terminals to the shock body to check for internal shorts.
3
Step 3: Inspect the harness for abrasion points along its route from module to actuator.
4
Step 4: Check the connector for water damage and corrosion. Clean and apply dielectric grease.
5
Step 5: Repair the short and verify proper actuator cycling through all damping modes.
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
The ride control module has detected a short-to-ground in the left rear shock actuator circuit. The control wire is grounded, preventing solenoid operation. The LR shock defaults to its base damping state with no electronic control capability.
The most common cause of C1908 (Ride Control LR Shock Actuator Circuit Short To Ground) is: Control wire insulation worn through from contact with rear suspension or body metalwork
Typical repair costs for C1908 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The LR shock is locked in its default damping mode, causing uneven rear suspension behavior. Handling may be affected, particularly during cornering and over bumps.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1908 to identify the root cause.
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Quick Info
Category
Chassis
System
Electronic Ride Control / Adaptive Suspension
Difficulty
Type
Manufacturer
Recommended Tools
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