What Does C1427 Mean?
The right rear electronically controlled damper circuit has an open circuit condition. The suspension control module cannot communicate with or control the right rear damper solenoid because the electrical path is broken. The driver may feel a noticeably softer or firmer ride at the right rear corner compared to other corners, and the suspension warning indicator will likely illuminate.
Common Causes
35%
Broken or disconnected wiring between the suspension module and right rear damper
30%
Failed right rear damper solenoid with open internal coil
20%
Corroded or backed-out connector pins at the damper or module
10%
Blown fuse or open relay in the damper supply circuit
5%
Suspension control module output driver failure
Diagnostic Steps
1
Disconnect the right rear damper connector and measure solenoid coil resistance — an infinite (OL) reading confirms an open solenoid coil requiring damper replacement.
2
If solenoid resistance is within specification (typically 3–15 ohms), perform a continuity test on each wire from the damper connector back to the suspension control module connector.
3
Inspect the connector at the right rear damper for backed-out pins, corrosion, or physical damage. Wiggle-test the connector while monitoring resistance for intermittent opens.
4
Check the damper circuit fuse in the underhood or body fuse box — replace if blown and investigate the root cause.
5
At the suspension control module connector, verify that the module is providing proper command voltage (typically 0–12V PWM) to the damper circuit output pin.
Estimated Repair Cost
$100 - $750
Parts + labor, varies by vehicle and location
The right rear electronically controlled damper circuit has an open circuit condition. The suspension control module cannot communicate with or control the right rear damper solenoid because the electrical path is broken. The driver may feel a noticeably softer or firmer ride at the right rear corne...
The most common cause of C1427 (Damper RR Circuit Open) is: Broken or disconnected wiring between the suspension module and right rear damper
Typical repair costs for C1427 range from $100 to $750, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Driving is generally safe at moderate speeds, but the right rear damper will remain in its default (failsafe) state, leading to unbalanced handling characteristics. Use caution in cornering and on uneven road surfaces. Repair promptly to restore full suspension control.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1427 to identify the root cause.
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Quick Info
Category
Chassis
System
Active Suspension / Ride Control
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