What does code P1602 mean on Hyundai vehicles?
The ECU detects a serial communication problem with the transmission control module.
OBD-II Code Hyundai
P1602 — Hyundai — TCM Serial Communication Problem
The ECU detects a serial communication problem with the transmission control module.
Common symptoms
- Erratic gear shifts
- transmission warnings
Possible causes
- CAN network issues
- wiring faults
- faulty TCM
Initial recommendation
Diagnose communication lines, inspect CAN wiring, verify TCM operation.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine Hyundai code P1602 with your vehicle's actual symptoms for more complete diagnostic guidance.
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