OBD-II diagnostic trouble code
P0720Caution

Output Speed Sensor Circuit Malfunction

The sensor measuring the transmission's output shaft speed (paired with the input speed sensor to determine gear) has failed entirely.

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Code names are compiled from open/standardized SAE and ISO references. Explanations, symptoms, causes and fixes are original. Covers generic (P0/C0/B0/U0) codes only — manufacturer-specific codes are planned for a future update.

Frequently asked questions

Can I drive with P0720?

You can usually keep driving with P0720, but don't put it off — the underlying cause can get worse or lead to further damage the longer it goes unaddressed. Get it diagnosed as soon as you reasonably can.

How much does it cost to fix P0720?

The cost varies too much by cause and vehicle to give a single figure here — a diagnosis will narrow it down.

What causes P0720?

AS
Reviewed by Artyom SemenovAutomotive Editor · Fact-checked by Yauheni Kapliarchuk, Editor-in-Chief
Code names compiled from open SAE/ISO references; explanations and repair guidance are original editorial content
Last verified: 09 Jul 2026 · Our methodology