Error code
OBD2 U0402
OBD2U0402
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Invalid Data Received From Transmission Control Module.
Severity
moderateCan drive but may experience shifting issues. It's recommended to address this issue promptly.
Summary
U0402 indicates invalid data received from the Transmission Control Module (TCM), which can affect communication between the TCM and Powertrain Control Module (PCM).
Symptoms
- Check engine light is on
- Transmission may shift erratically or not at all
Common Causes
- Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors in the TCM and associated harnesses
- Defective TCM
- Defective transmission
Diagnosis
- Inspect wiring and connectors between PCM and TCM for damage or corrosion
- Check for additional codes related to the transmission system
Fixes
- Replace damaged wiring, connectors, or faulty TCM
FAQ
Can I drive with U0402?
You can drive but may experience shifting issues. It's recommended to address this issue promptly.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- U0400Invalid Data Received
- U0401Invalid Data Received From ECM/PCM
- U0403Invalid Data Received From Transfer Case Control Module
- U0404Invalid Data Received From Gear Shift Control Module
- U0405Invalid Data Received From Cruise Control Module
- U0406Invalid Data Received From Fuel Injector Control Module
- U0407Invalid Data Received From Glow Plug Control Module
- U0408Invalid Data Received From Throttle Actuator Control Module
- U0409Invalid Data Received From Alternative Fuel Control Module
- U0410Invalid Data Received From Fuel Pump Control Module
- U0411Invalid Data Received From Drive Motor Control Module
- U0412Invalid Data Received From Battery Energy Control Module A