how to clear limp mode code

Hello, "clearing" a code is something that must be done with a diagnostic tool. Yes, you could purchase one and clear the code, but my bigger concern is that a larger problem -- even though perhaps intermittently occurring -- is present. This code is meant to protect the powertrain and exhaust system from serious damage due to a concern that is present. Defeating the safety mechanism only serves to put your vehicle at risk of very costly repairs, and you personally at a possibly safety risk in the event the warnings come on. Extended troubleshooting time is likely needed to determine the cause of the concern -- I would suggest more time with a trusted technician on this one. Good luck.