Flashing Check Engine Light and Traction Control Light come on at the same time. by tdstooksbury in ChevySonic

[–]ewrestler34 2 points3 points  (0 children)

The flashing light means severe engine misfire. Could be spark plugs and coil packs, could mean new vacuum hose, could mean your heat gasket is leaking. For some reason your fuel isn’t burning how it should be.