Q: Service suspension system is on

asked by on

Yes hi service suspension system light have been on in my car and I have no idea what to do. When I start braking after going like 50mph or higher my car would start shaking. But only when I'm braking it shakes bad. I had new brakes and rotors put on. Plus outter tire rod end. Just everything don't know body seem to know why this warning light on or why my car is shaking so bad. So can u help??

2006 Buick Lucerne v8 North Star engine My car has 130000 miles.
My car has an automatic transmission.

If the suspension warning light is illuminated that means that trouble codes have been stored. Those codes should be downloaded by a mechanic and evaluated to determine the cause of the fault. Once the fault is pinpointed, necessary repairs are made and that could involve anything from fixing a loose wire to replacing a bad sensor. In all events, the issue is definitely resolvable if you request a suspension warning light diagnostic.


With regard to the vibration on braking, such vibration is typically due to excessive thickness variation in the brake rotor, brake pad defects, or excessive rotor runout as installed on the wheel hub. Suspension faults are possible, too. If the brake rotors that were installed on your car are new and are OEM (dealer supplied), thickness variation in the rotor is not generally an issue but you still could have vibration due to excessive run-out as the rotor sits on the wheel hub. As installed on the wheel hub, rotor run-out should be measured by the mechanic using a specialized dial indicator and verified to be LESS than .002 inches. If installed rotor run-out exceeds .002 inches, the run-out MUST be corrected by shimming or re-indexing the rotor to the hub. To have the root cause of the brake vibration identified, please request a brake and suspension system diagnostic. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Service suspension system is on

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Brake pedal hit the floor. Very hard to stop car.

First thing is you do not have any brakes and should not attempt to drive the vehicle until the brakes are repaired. The brake pedal is going to the floor due to a major brake fluid leak from the left...

Q: Transmission jerks, goes into limp mode, loss of power - 2006 Mercedes-Benz B200

Hello. It sounds like there is a problem with either the transmission control module and/or its wiring. There could also be a problem with the transmission valve body or clutches and if either of these are worn out this may...

Q: Hi. I have a problem with my 86 regal. My 307 will shake and smoke a little every morning after the car has sat over night.

Hi there. It sounds like the needle and seat in the carburetor is not sealing off correctly and making the fuel drip over when the engine is sitting. Try pumping the throttle 2 times after you shut the engine off...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...