What does code P1605 mean on Nissan vehicles?
A communication error has been detected in the automatic transmission diagnostic communication line.
OBD-II Code Nissan
P1605 — Nissan — Automatic Transmission Diagnostic Communication Line
A communication error has been detected in the automatic transmission diagnostic communication line.
Common symptoms
- Shift issues
- transmission malfunction
Possible causes
- Communication line fault
- wiring issue
Initial recommendation
Check TCM communication line and related wiring.
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.
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