What does code P1631 mean on Mazda vehicles?
The ECU detects no output voltage signal from the generator/alternator.
OBD-II Code Mazda
P1631 — Mazda — Generator Output Voltage Signal (No Output)
The ECU detects no output voltage signal from the generator/alternator.
Common symptoms
- Battery discharge
- charging system failure
Possible causes
- Alternator failure
- wiring issue
Initial recommendation
Test alternator output and inspect charging circuit.
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
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