The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2020 Aviator Air Suspension Sagging & Compressor Noise

0

Sarah K. · rep 0 · May 22, 6:05 AM · 1 replies · solved · Question

Vehicle: 2020 Lincoln Aviator Reserve

Hey everyone,

I'm having some trouble with the air suspension on my 2020 Lincoln Aviator Reserve. Lately, I've noticed that the rear end sags significantly overnight, sometimes even the front too. When I start it up in the morning, the compressor runs for a good while, and it sounds pretty loud.

After driving for a bit, it usually levels out, but the ride feels a bit stiffer than usual. I also got a 'Service Air Suspension' message on the dash a couple of times. I'm worried about potential damage or if this is a common issue.

Has anyone else experienced this with their Aviator? What could be causing it, and what should I check first? Any advice would be greatly appreciated before I take it to the dealer.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 6:05 AM

0

ClearTheCode admin answer:

It sounds like your 2020 Lincoln Aviator Reserve is experiencing common symptoms of an air suspension system fault. This can range from minor leaks to a failing compressor or sensor issues.

Here are the typical causes and diagnostic steps:

  1. Air Leaks: The most common cause of sagging is a leak in the air springs (air bags), air lines, or valve block. Over time, rubber components can crack or seals can fail.

    • Diagnosis: A visual inspection for cracks on the air springs (especially when lifted) can sometimes reveal leaks. Soapy water spray can also be used on connections and air springs to look for bubbles.
    • OBD Codes: Leaks can sometimes trigger codes like C1A36 (Air Supply Leak) or C1A20 (Pressure Sensor Fault if the system struggles to maintain pressure).

  2. Failing Air Compressor: If the compressor is running frequently and loudly, it might be overworked due to a leak, or it could be failing itself. A weak compressor struggles to inflate the system to the correct pressure.

    • Diagnosis: Listen for unusual grinding or rattling noises. Check if the compressor cycles on and off excessively.
    • OBD Codes: C1A27 (Compressor Fault) or C1A28 (Compressor Relay Fault) are common.

  3. Height Sensor Malfunction: The system relies on height sensors at each wheel to determine the vehicle's level. A faulty sensor can send incorrect readings, causing the system to over-inflate, under-inflate, or sag.

    • Diagnosis: A diagnostic scan tool is needed to read live data from the height sensors.
    • OBD Codes: C1A00 (General Electrical Fault), C1A03 (Height Sensor Fault).

  4. Control Module Issues: Less common, but the air suspension control module itself could be faulty, leading to incorrect operation.

When to See a Shop: Given the 'Service Air Suspension' message and the persistent sagging, it's highly recommended to have your Aviator inspected by a qualified technician or a Lincoln dealership as soon as possible. Driving with a compromised air suspension can affect ride quality, handling, and potentially lead to premature wear on other suspension components or tires. A professional can accurately diagnose the specific component failure using specialized diagnostic tools and perform necessary repairs or replacements, ensuring your vehicle's safety and comfort.

Menu

Help & account