My 2010 mustang is doing this limp mode cycle. iv rebuilt transmission replace throttle postion sensor gas pedal pastion sensor throttle body plugs plug wires coil pack map sensor gas filter even fixed few extra thing that i know it need that woukd have nothing to do with my main problem like housing thermastate an racapenion anyways its still cranks but no power i may get . Little down the rd but like you said turn it off an back on an it may run good for moment but then its like its going...

Wrench light comes on and car goes to limp-mode