Seen the air suspension light on your dashboard, and not sure what it means?
The warning typically indicates something is wrong with the air suspension system, which is responsible for providing a smooth and level ride. Like other parts, suspension components have an expiration date; once they fail, you may experience poor handling and other issues.
Worried about how to deal with this warning light?
Let’s break down what the “check air suspension” light means, how to fix it, and explore ways to keep it from returning.
This Article Contains:
- What Does “Check Air Suspension” Mean?
- Is It Safe to Drive with an Active “Check Air Suspension” Warning?
- 6 Critical Signs Your Air Suspension System Isn’t Working
- How to Diagnose and Fix an Air Suspension Issue
- What to Consider When Buying a New Air Suspension Kit
- What Causes the Air Suspension System to Fail?
- What Are the Ways to Prevent an Air Suspension Problem?
What Does “Check Air Suspension” Mean?
The “check air suspension” warning light activates when the suspension control module (SCM) and engine control module (ECM) detect a problem with the air suspension system.
The light turns on when the system components can no longer adjust the vehicle’s height or provide ride comfort.
Typically, in a working system, a ride height sensor measures how far your car sits above the ground and sends this data to the control modules. Using this information, the modules activate the compressor, which pumps compressed air into the air springs to raise or lower your vehicle for improved stability and comfort.
However, if parts, like the ride height sensor or air spring (air bag), fail, you’ll see an active light or “Stop, car too low” message.
So, can you drive with an air suspension light?
Let’s find out.
Is It Safe to Drive with an Active “Check Air Suspension” Warning?
No, it’s not safe.
A malfunctioning air suspension system (AKA air ride system) can’t stabilize your car correctly. This affects vehicle weight distribution and makes steering more difficult, especially in emergencies or stop-and-go traffic.
Moreover, delaying repairs can strain other suspension parts and prematurely wear them out, adding to your troubles. To avoid extensive damage, it’s best to call a technician ASAP.
If you’re unsure whether your air suspension needs a check, here’s how to verify it:
6 Critical Signs Your Air Suspension System Isn’t Working
Here’s how a vehicle owner can tell their air suspension needs repair:
- Active dashboard lights: This is the clearest sign. If parts like solenoid valves or sensors fail, you may see a “Stop, car too low” message or a car icon with vertical or horizontal arrows. Sometimes, when a related air suspension part fails, the ECM may also activate the check engine light.
- The vehicle jolts excessively: A failing air ride system can’t effectively manage your vehicle’s weight or dampen road vibrations. As a result, your car will jolt or shake excessively, especially when you drive over uneven surfaces and bumps.
- Difficulty steering due to sagging: If the front air bag doesn’t have enough air pressure, the front of your car may sit lower than usual. This sagging can cause the steering to feel off and make the car sway or roll when turning around corners.
- Air compressor trouble: The compressor usually fills the front and rear suspension airbags to lower or raise the vehicle based on the computer’s input. If it fails due to wiring or internal damage, the air bag won’t inflate properly, triggering the dashboard light.
- Air leak in the suspension system: If there’s a leak in the line or spring, compressed air will escape, preventing the system from maintaining pressure. This often causes the suspension to sag and may activate the air suspension warning light.
Do some of these signs sound familiar?
Keep scrolling to see what you can do about them.
How to Diagnose and Fix an Air Suspension Issue
Air suspension systems are primarily found in luxury or high-end vehicles and are more complex than traditional setups with coil springs or air shocks.
Troubleshooting these advanced systems requires technical know-how, extra care, and tools, such as a test light, scanner, or multimeter. Without them, a driver could overlook critical issues, leaving the root problem unresolved.
That’s why calling a professional mechanic is often the best option. Let’s have a look at what they’ll do:
- Scan for error codes: They’ll use a scan tool to find an active fault code, such as C1881 “Air Suspension RF (Rear Front) Height Sensor Circuit Failure.” This fault code will help identify the culprit quickly.
- Look for an air leak and fix it: Then, they’ll inspect each air line or spring for cracks and replace the damaged parts to maintain proper air pressure.
- Restore electrical connections: Now, they’ll replace loose or corroded wires, as these can interrupt communication between the suspension components and control modules.
- Assess and change the sensors: The next step for them is testing the height sensors using a multimeter. If the sensors’ readings are off and they’re severely damaged, the mechanic will install new ones.
- Examine and replace the compressor: It’s now time for them to inspect the air compressor and replace it if it’s cracked or worn. Then, with a test light, they’ll check the compressor’s connector for power and ground to confirm that it’s receiving electrical input.
- Update the control modules: They’ll now verify that the control modules are sending correct signals to the front and rear suspension parts. The mechanic will reprogram or update their software if it’s outdated or glitchy.
- Recalibrate and test drive: They’ll clear the codes, reset the dashboard lights, and recalibrate the sensors using a scan tool. Then, they’ll check the vehicle for sagging and test drive it to verify ride stability.
NOTE: To get maximum performance, you must install suspension parts suitable for your car.
But how do you decide which replacement part is best for your vehicle?
Read on to find out.
What to Consider When Buying a New Air Suspension Kit
Here are some factors every vehicle owner should check before making a purchase:
- Motor vehicle model and make: High-performance vehicles need parts that can handle more power and speed, while luxury models often require specialized components only available at select dealerships.
- Driving requirements: If you frequently tow heavy loads or go off-road, your car will require parts that can withstand the increased load and suspension demand.
- Parts quality: Aftermarket kits can be budget-friendly, but they may not offer the same durability or performance as original equipment manufacturer (OEM) parts.
- Warranty coverage: Air suspension parts are vulnerable to road debris and harsh weather. It would be wise to buy a kit with solid warranty coverage in case of premature failure or fitment issues.
- Kit inclusions: Some air suspension kits include all the necessary parts, such as the airbags, lines, sensors, etc. Choosing a complete kit ensures fewer compatibility and installation issues.
What Causes the Air Suspension System to Fail?
An air suspension system can wear out due to:
- Local weather: Since the suspension components sit underneath the vehicle, they’re exposed to moisture and road salt, especially in regions with extreme cold or high humidity.
- Air spring wear: Air springs are made of flexible rubber that can crack because of road debris or physical impact, affecting the system’s performance.
- Failing sensors: Ride height sensors are sensitive to moisture and rust accumulation. Once damaged, they can send incorrect signals to the control module, preventing the system from maintaining proper air pressure.
- Loose wires or connections: Each air suspension part requires a steady electrical connection. If there are loose or faulty wires, the system may receive inconsistent power and fail to adjust the vehicle height correctly.
Curious how to avoid these issues?
Let’s explore your options.
What Are the Ways to Prevent an Air Suspension Problem?
Keep your air suspension running smoothly with a bit of extra care and these tips:
- Avoid overloading the car to reduce strain on the air suspension system.
- Drive slowly over rough surfaces to avoid physical damage to the system parts.
- Install high-quality air line and spring to prevent accelerated wear or leaks.
- Schedule regular inspections of parts like air springs and sensors.
- Keep the suspension airbags inflated between 5 to 100 psi (pounds per square inch), depending on the manufacturer’s recommendation.
Access Easy Air Suspension Repairs with AutoNation Mobile Service
A working air suspension system is essential for smooth and comfortable drives. But if you spot an illuminated air suspension warning light or feel extra swaying around corners, it’s time to visit a mechanic.
Can’t make it to the garage?
Don’t worry! AutoNation Mobile Service mechanics can come to you. Our experts have the tools and skills to tackle car suspension issues right from your driveway.
What’s more?
You get simple online bookings and a 12-month, 12,000-mile warranty on all car repairs.
So, don’t wait; contact us to fix your air suspension woes today.