Air Suspension Gate Solenoid Short to Battery
Code C1871 indicates a short to battery positive in the air suspension gate solenoid circuit. The suspension control module detects excessive voltage, meaning the wiring is contacting a direct battery source. This prevents proper solenoid operation, leading to erratic ride height or system shutdown as a safety measure.
1. Commonly Affected Makes
2. Most Common Causes
- Short to battery positive in the solenoid wiring
- Faulty air suspension gate solenoid with internal short
- Corroded, bent, or pushed-back pins in the electrical connector causing a bridge
- Defective air suspension control module (ASCM)
- Chafed wiring harness near wheel or chassis area
3. Symptoms You Will Notice
- Vehicle sits unevenly or at incorrect ride height
- Suspension warning light illuminated on dashboard
4. Step-by-Step Diagnosis
Scan for related codes and check freeze frame data
Visually inspect the solenoid wiring and connector for damage, corrosion, or shorts
Test the solenoid resistance and check for continuity to battery positive
Check the ASCM for proper operation and perform a solenoid actuation test
5. Frequently Asked Questions
Is it safe to drive?▼
No, driving with this code is not recommended. The suspension may become unstable or fail, posing a safety risk. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Repair costs typically range from $200 to $800, depending on whether the issue is a simple wiring repair or requires replacing the solenoid or control module.