What does code P1600 mean on Lexus vehicles?
The ECU detects a failure in the constant battery power supply (BATT) to the ECM.
OBD-II Code Lexus
P1600 — Lexus — ECM BATT Malfunction
The ECU detects a failure in the constant battery power supply (BATT) to the ECM.
Common symptoms
- Check engine light
- possible no-start or memory loss
Possible causes
- Battery voltage issues
- blown fuse
- poor power connection
Initial recommendation
Check battery condition, fuses and ECM power supply circuits.
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 Lexus code P1600 with your vehicle's actual symptoms for more complete diagnostic guidance.
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