. code p0720 refers to the output shaft sensor --ECM or transmission control module (TCM) the vss reports to the tcm which reads the road speed and gear ratio and shifts the appropriate solenoid May 12, 2017 Cars & Trucks 4 helpful 1 answer Check engine light with following codes p 1529 p0720 p0715. p0720 ford. . add umap coordinates to seurat object. Step 3. . . . .