HomeDTC Codes › P0721

P0721 — Output Speed Sensor Range/Performance

Output speed sensor signal is erratic.

Severity: HighRepair: $50-$400Difficulty: Medium

Don't guess — diagnose P0721 the right way

ScanFixAI reads every module, finds the real root cause, and tells you exactly what to check.

Download ScanFixAI Free

Common symptoms of P0721

Common causes of P0721

Repair cost & difficulty

Typical cost to fix P0721: $50-$400 · Difficulty: Medium

Pro tip: Check for metal debris on sensor tip.

Vehicles commonly affected

All makes

Related trouble codes

© 2026 ScanFixAI · AI-powered car diagnostics. All trouble codes · Home · Compare

ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.