Causes and Fixes U0402 Code: Invalid Data Received from TCM

How to fix a U0402 Code: Invalid Data Received from TCM A U0402 Code is set when the ECM/PCM sees that the TCM data is not correct or implausible. Common causes of the U0402 code include inaccurate sensor readings, a bad battery, bad TCM, and transmission failure. A U0402 Code can be difficult to troubleshoot sometimes since it involves computer modules, wiring, and sensors. Possible Causes of a U0402 Code Bad Battery or Charging Issue Bad Wiring (Open / Short / Fuse / Bad Ground) Bad Transmission Sensor Bad TCM Transmission Failure By using this information user assumes all risk of use.