There is no fault code for herdsmen to accelerate and not shift up.

Improper throttle adjustment. If the accelerator cable or accelerator position sensor is not adjusted correctly during the rapid acceleration of herdsman, there will be no upshift and no fault code. Jeep Shepherd Jeep's latest RockTrac part-time 4wd system is the core of Jeep Shepherd Rubicon's super climbing ability and the most professional mechanical four-wheel drive system in the industry. Since its birth, Jeep herdsman has been regarded as the ultimate aspiration of cross-country enthusiasts all over the world, symbolizing freedom and passion, as well as the understanding and pursuit of a purer lifestyle.