What does code P1900 mean on Infiniti vehicles?
The ECU detects a malfunction in the engine cooling fan operation.
OBD-II Code Infiniti
P1900 — Infiniti — Cooling Fan Malfunction
The ECU detects a malfunction in the engine cooling fan operation.
Common symptoms
- Engine overheating
Possible causes
- Faulty cooling fan motor
- relay failure
- wiring issues
Initial recommendation
Inspect cooling fan motor, relays, and wiring; verify proper fan 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 Infiniti code P1900 with your vehicle's actual symptoms for more complete diagnostic guidance.
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