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TransmissionModerate⚠️ Professional Recommended

P0721

Output Speed Sensor Circuit Range/Performance

The transmission output speed sensor reading is outside the expected range.

SeverityModerate
CategoryTransmission
Est. Repair Cost$200-$500
Code TypePowertrain
DIY RepairProfessional

⚡ Common Causes

⚠️ Symptoms

✅ How to Fix — Step by Step

  • Step 1:Inspect sensor wiring
  • Step 2:Test sensor output
  • Step 3:Replace sensor if faulty
💡 Pro Tip: If your speedometer is also acting up alongside this code, that's a strong confirming sign the output speed sensor itself is at fault.

Repair Cost Estimate

Full Repair Estimate
$200-$500
DIY Possible?
PRO
Severity
Moderate

Frequently Asked Questions

What does OBD2 code P0721 mean?+
P0721 stands for Output Speed Sensor Circuit Range/Performance. The transmission output speed sensor reading is outside the expected range.
What causes code P0721?+
Faulty output speed sensor; Damaged tone ring; Wiring fault
How do I fix code P0721?+
Inspect sensor wiring; Test sensor output; Replace sensor if faulty
How much does it cost to fix P0721?+
Estimated repair cost for P0721 is $200-$500.
Is P0721 DIY-friendly?+
P0721 typically requires professional equipment and a qualified mechanic.

AI Diagnosis

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