What should I do if the throttle does not rebound after turning off the exhaust brake?

The treatment methods of this situation include checking the exhaust braking system, cleaning the throttle and checking the circuit.

1. Check the exhaust braking system: Check whether there is any fault in the exhaust braking system, such as blocked air passage and stuck valve. If so, the faulty parts need to be repaired or replaced.

2. Cleaning the accelerator: It is caused by carbon deposition or dirt on the accelerator pedal or accelerator position sensor. It can be cleaned with cleaning agent and then lubricated to solve the problem.

3. Check the circuit: the accelerator pedal will not rebound due to circuit problems. Check related circuits for open circuit or short circuit, and repair the faulty circuit.