What does code P1521 mean on Mazda vehicles?
The ECU detects a fault in variable resonance induction system (VRIS) solenoid 1 circuit.
OBD-II Code Mazda
P1521 — Mazda — VRIS Solenoid 1 Circuit
The ECU detects a fault in variable resonance induction system (VRIS) solenoid 1 circuit.
Common symptoms
- Poor low-end torque
- reduced performance
Possible causes
- Failed VRIS solenoid 1
- wiring fault
Initial recommendation
Test VRIS solenoid 1 operation and inspect 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.
Analyze this code with MecaOBD
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