How to repair the U0401 trouble code?
1 Answers
Go to the service station for inspection, as this trouble code requires specialized equipment for diagnosis. Resolve it as soon as possible to eliminate future concerns. Additional information about the U0401 trouble code is as follows: 1. Chinese definition: The transmission control module received an invalid or inaccurate torque control signal from the powertrain control module. 2. The meaning of trouble code P0420: It indicates a failure or low efficiency of the three-way catalytic converter. The three-way catalytic converter and oxygen sensor should be checked. 3. U0401: Invalid data received from the engine control module/powertrain control module A.