Service Engine Soon Light

Are you saying you checked for trouble codes and did not find any ?

It sounds like it could be the o2 sensors, the mass air flow sensor, or the idle air control valve, take the vehicle to your local auto parts store and have them connect their scanner and pull the codes.

The following are descriptions from the Mini-Cooper S owner's manual.

Service Engine Soon "?If the warning lamp comes on
either continuously or intermittently, this indicates a malfunction in the emissions-related electronic systems."

EML light: "Engine electronics ?Malfunction in the engine electronics. You can continue to drive with reduced engine output or engine speed."

Triangle circled by an arrow: "Automatic Stability Control plus
Traction (ASC+T)/Dynamic Stability Control (DSC)
?Indicator lamp flashes: System active: drive and braking forces are regulated.
The indicator lamp stays lit: ASC+T/DSC switched off with button or defective. In the event of a defect: please have the system inspected at your MINI Dealer."

First, inspect the belts to make sure none failed at high RPM. If one broke, inspect any cable or hoses in the plane of the belt to see if there was any damage (e. g., a ripped wire in the ASC+T/DSC system). Second, get a readout of the engine error code. (If you get indications of a major vacuum leak including rough idle, look for a blown head gasket.) If you get something else, please post the results in a comment so we can go to the next step.

if your car has an automatic trassmision , the problem is the clutcht not the ABS

Did you replace those parts based on the trouble code? Or are you just throwing parts at it? What are the codes?

http://ricksfreeautorepairadvice.com/flashing-check-engine-light-is-serious/

get the failure codes! flashing "service engine soon" lamp means you are damaging your catalyic converters. you could have restricted converters also either too lean fuel mix or or too rich fuel mix. the only other way the lamp flashes is if the engine is misfiring. bottom line, get the codes first so i can help further. the codes will lead you to the problem. it will not necessarily tell you what the problem is.

flashing check engine light is a sever engine misfire that will cause a catalytic convertor failure which is about a $1500 repair in your denali. Have someone scan the code for you and let us know the codes stores in the computer are. Could be as simple as a tune up to fix the problem or bad as a fuel pump

You'll need to know why the service engine light comes on, they can check this by using a OBD II diagnostic tool to find the trouble code stored in the pcm, ask them to run a check on it, or you can take it to a mechanic before you buy it to have them check over the vehicle for any minor or major problems.

My service engine soon light stays on. The vihicle shakes as it idles. It act it wants to shut off. What's the problem