LR Air Spring Vent Solenoid Stuck Open
The Air Suspension Control Module (ASCM) has detected that the left rear air spring vent solenoid has remained open longer than the calibrated time without achieving the expected pressure or height change. This indicates the system cannot lower the left rear corner within the maximum allowed time.
1. Commonly Affected Makes
2. Most Common Causes
- Left rear vent solenoid stuck, blocked, or internally damaged
- Restriction, kink, or obstruction in the air line between the spring and the valve block
- Left rear height sensor or its circuit out of range or faulty
- Leak in the left rear air spring preventing pressure stabilization during venting
- Short to ground or battery in the LR vent solenoid control circuit
- Internal failure of the Air Suspension Control Module (ASCM)
3. Symptoms You Will Notice
- Vehicle leans to the left rear or sits unevenly
- Air suspension warning light illuminated
4. Step-by-Step Diagnosis
Scan for additional codes and check freeze frame data
Inspect left rear air spring for leaks and physical damage
Check left rear height sensor signal and circuit integrity
Test LR vent solenoid operation and resistance
Inspect air lines for kinks, restrictions, or blockages
Verify ASCM power, ground, and communication
5. Frequently Asked Questions
Is it safe to drive?▼
Driving is possible but not recommended for long distances; the vehicle may sag on one side, affecting handling and ride comfort. Have it inspected soon.
How much does it cost to fix?▼
Repair costs typically range from $200 to $800, depending on whether the solenoid, air spring, or ASCM needs replacement, plus labor.