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2016 Model S Air Suspension Malfunction - Uneven Ride Height & Error Message

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Mike T. · rep 0 · May 25, 4:01 AM · 1 replies · solved · Question

Vehicle: 2016 Tesla Model S 75D

Hello ClearTheCode community,

I'm having a significant issue with my 2016 Tesla Model S 75D's air suspension. Lately, I've noticed the car sitting unevenly, with one corner (usually the front passenger side) appearing lower than the others. This is happening even after the car has been parked for a while.

To make matters worse, I'm now getting a 'Suspension Malfunction' error message on the display. The ride quality has also deteriorated, feeling much harsher than usual. I've tried cycling through the suspension height settings, but it doesn't seem to resolve the issue permanently.

Has anyone else experienced this with their older Model S? What could be the potential causes, and what should I do next? I'm worried about driving it too much like this.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:01 AM

0

ClearTheCode admin answer:

An uneven ride height combined with a 'Suspension Malfunction' error on a 2016 Tesla Model S points to a problem with the air suspension system. This is a common issue on older air suspension systems as components age.

Common Causes:

  1. Air Spring Leak (Air Strut/Bag): This is the most frequent cause. The rubber components of the air springs can develop cracks or tears over time, allowing air to leak out, leading to one or more corners sagging. The compressor will try to compensate, but eventually, it can't keep up.
  2. Air Compressor Failure: The air compressor is responsible for supplying air to the springs. If it's failing or has a leak in its lines, it won't be able to maintain proper pressure, leading to unevenness or complete system failure. Overworking due to a leak elsewhere can also cause it to fail.
  3. Ride Height Sensor Malfunction: Each wheel has a sensor that tells the car's computer the current ride height. If a sensor fails or becomes miscalibrated, the system might incorrectly adjust the height, leading to an uneven stance.
  4. Valve Block Issues: The valve block distributes air from the compressor to the individual air springs. A faulty valve block can improperly direct or retain air, causing unevenness.
  5. Wiring/Electrical Issues: Less common, but damaged wiring or a faulty control module could also disrupt the suspension's operation.

What You Can Do:

  1. Visual Inspection: Carefully inspect the air springs (the large rubber bellows around the shock absorber) at each wheel for any visible cracks, tears, or signs of air leakage (sometimes a soapy water spray can reveal small leaks).
  2. Check for Error Codes: While you see a dashboard message, a deeper scan with a diagnostic tool (like Tesla's service tools or advanced OBD-II scanners) can reveal specific DTCs (Diagnostic Trouble Codes) related to the suspension system, such as C0030 (Air Suspension Compressor Control Circuit), C0031 (Ride Height Sensor Fault), or codes related to specific air spring pressure faults.

When to See a Shop:

  • Immediately: If the car is severely sagging, touching the tires, or if the 'Suspension Malfunction' message is red and warns against driving. Driving with a severely compromised suspension can be unsafe and cause further damage.
  • If you cannot identify a simple cause during a visual inspection.
  • If the issue is intermittent but persistent.
  • Any time you suspect a major component like an air spring or compressor is failing. These are complex systems requiring specialized tools and expertise for diagnosis and repair.

A Tesla Service Center or a reputable independent shop specializing in Tesla vehicles will have the necessary diagnostic equipment to pinpoint the exact component failure and perform the repair. Ignoring this issue can lead to complete suspension failure, making the vehicle undrivable.

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