Fault Code U0446
Code meaning, symptoms, possible causes, part number, and estimated cost.
U0446
Invalid Data Received From Control Module
This code indicates that the PCM received invalid data from the Transmission Control Module, which can lead to shifting problems and reduced vehicle performance.
Part Details
Part Name
Transmission Control Module (TCM)
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪1000 - ₪5000
Engine Location
Transmission
Symptoms
- Hard/rough shifting
- Vehicle enters limp mode
- Check Engine/Transmission warning light on
- Increased fuel consumption
Possible Causes
- 1Internal TCM failure
- 2Wiring issues or loose/damaged connector
- 3CAN Bus communication network interference
- 4Faulty transmission speed sensor
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