What causes a P0720 code?

Common causes: Failed sensor; Damaged tone ring; Wiring.

What are the symptoms of a P0720 code?

Typical symptoms: Speedo erratic; Harsh shifts; Trans limp.

No — this code can cause damage if you keep driving. Get it diagnosed before continuing. Estimated repair: $150-$500.

OBD-II Code · Powertrain

Output Speed Sensor Circuit

high severityDo not drive$150-$500

Trans output-shaft speed sensor circuit fault.

Common symptoms

Likely causes

Where to start

Try the cheapest cause first. Start by checking: failed sensor.
Cost & scope. $150-$500
If the code returns after the fix: escalate to a shop or scanner with live-data and freeze-frame. A code that re-sets means the underlying fault is still there. Don't keep driving with this one active — risk of damage.

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