DTC code
P0721
Output Shaft Speed Sensor Circuit Range/Performance
Technical guide
reference — not individually verifiedSymptoms
- Check engine or transmission warning light on
- Harsh
- delayed
- or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Probable causes
- high: Output speed sensor failed
- low: Sensor element aged beyond calibration window
- low: Sensor mounting loose - signal damping
Diagnostic steps
Check the components involved: transmission output speed sensor, sensor wiring. Verify wiring and connectors before replacing any part. Job difficulty: medium (workshop equipment required). Typical European range — 150-800 EUR, 1-4 h. Reference values only.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
Models most reported with this code (NHTSA)
Count of distinct owner complaints mentioning the code. US data — same engines, same failures.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0721
Nothing confirmed yet for this code. No guess is offered on purpose.
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