U0402
Invalid Data Received From TCM
U0402 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From TCM. Common causes: wiring problems between ecu and tcm, tcm module malfunction. Estimated repair cost: $56–278.
Symptoms
- Transmission transition to emergency mode
- Incorrect gear shifting
- Check Engine Light Illuminates
- Reduced engine power
- Increased fuel consumption
Causes
- Wiring problems between ECU and TCM
- TCM module malfunction
- Problems with connectors
- CAN bus fault
- Software errors in modules
How to Fix
- Check wiring integrity between ECU and TCM
- Inspect and clean connectors
- Carry out CAN bus diagnostics
- Update module software
- Replace TCM if necessary
Related codes
Error U0402 by Vehicle Brand
FAQ
What does the U0402 code mean?
U0402 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From TCM
What causes a U0402 error code?
The most common causes of U0402 include: Wiring problems between ECU and TCM; TCM module malfunction; Problems with connectors; CAN bus fault.
How do I fix a U0402 diagnostic trouble code?
To fix U0402: Check wiring integrity between ECU and TCM. Inspect and clean connectors. Carry out CAN bus diagnostics. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0402?
Limited driving only, diagnose soon
How much does it cost to fix U0402?
The estimated repair cost for U0402 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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