2018 Ram 1500 Air Suspension Sagging Overnight - Driver's Rear

ClearTheCode admin answer:

Air suspension sagging on one corner of your 2018 Ram 1500 Laramie is a common issue and usually points to a leak in the system. While it's good that the compressor is still able to level it out, addressing this sooner rather than later can prevent further wear on the compressor.

Here's what to check and consider:

1. Inspect for Leaks: The most common cause is a leak in the air spring (air bag) itself, or a connection point. You can try a simple soap and water test. With the suspension aired up, spray soapy water on the air spring, air lines, and fittings around the affected wheel. Look for bubbles forming, which indicate an air leak.
2. Air Line Integrity: Check the air lines for any visible damage, cracks, or chafing, especially where they might rub against the frame or other components.
3. Height Sensor Issues: While less common for a single-corner sag, a faulty height sensor could potentially give incorrect readings, leading the system to deflate that corner. However, this usually triggers a warning light.
4. Compressor Overwork: If there's a persistent leak, your air suspension compressor will be working harder and more frequently to maintain ride height. This can lead to premature failure of the compressor.

When to See a Shop:

• If you can't locate the leak yourself or if the issue persists after a visual inspection.
• If the compressor starts running excessively, becomes very noisy, or if the truck fails to level itself.
• If any warning lights related to the suspension or 'Service Air Suspension' message appear on your dash.

Ignoring a persistent leak can lead to a completely failed air spring, a burnt-out compressor, and potentially leave your truck undriveable or with a severely compromised ride quality. A professional can perform a more thorough diagnostic, including checking for fault codes with a specialized scanner, and pinpoint the exact source of the leak.