What Does C1875 Mean?
The air suspension right front (RF) air spring solenoid output circuit is shorted to battery voltage. The module detects unwanted voltage on the solenoid circuit, which can cause uncontrolled solenoid operation or force the module to disable the air suspension system. The RF air spring may over-inflate or the system may shut down entirely to prevent damage.
Common Causes
35%
Chafed wire insulation in the RF solenoid harness making contact with a power wire or power distribution terminal
25%
Pinched or crushed harness at a connector, frame clip, or body panel pressing the solenoid wire against a power source
20%
Moisture and corrosion in the solenoid connector bridging to a powered terminal in the same connector block
12%
Internal solenoid short from coil winding to the power supply terminal inside the valve assembly
8%
Air suspension module output driver internally shorted to the power rail
Diagnostic Steps
1
Disconnect the RF solenoid connector. With the solenoid not commanded, measure voltage on the module-side harness wires. Battery voltage on the ground-switched output wire confirms a short to battery in the harness.
2
With the solenoid disconnected, measure resistance from each solenoid terminal to the battery positive post. Low resistance (under 100 ohms) identifies a short through the solenoid or harness.
3
Inspect the RF solenoid harness routing carefully, especially where it runs through the fender well, alongside engine bay power cables, or near the fuse box. Look for abraded, melted, or pinched insulation.
4
Disconnect intermediate connectors in the harness and test each segment independently to isolate which section contains the short.
5
With the entire harness disconnected from the module, check the module output pin to battery voltage to determine if the module itself has an internal short.
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
The air suspension right front (RF) air spring solenoid output circuit is shorted to battery voltage. The module detects unwanted voltage on the solenoid circuit, which can cause uncontrolled solenoid operation or force the module to disable the air suspension system. The RF air spring may over-infl...
The most common cause of C1875 (Air Suspension RF Air Spring Solenoid Output Circuit Short To Battery) is: Chafed wire insulation in the RF solenoid harness making contact with a power wire or power distribution terminal
Typical repair costs for C1875 range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A short to battery can cause uncontrolled solenoid operation, potentially over-inflating the RF air spring beyond its design pressure, which could damage the spring or cause a blowout. The constant current can also overheat wiring and create a fire hazard. Do not drive until the short is identified and repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1875 to identify the root cause.
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Quick Info
Category
Chassis
System
Air Suspension
Difficulty
Type
Manufacturer
Recommended Tools
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