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DTC code page

P0722: Output Speed Sensor No Signal

Quick answer: The transmission controller sees no usable output-speed signal.

Drivers also search this fault as output speed sensor no signal, OSS no signal, no output shaft speed signal.

Severity: high Family: powertrain Related paths: 9
Meaning

What P0722 usually means

P0722 is the no-signal branch of the output-speed family. The TCM is missing the data it uses to confirm how fast the transmission output is actually turning, which makes gear-ratio logic and shift verification much harder. On real vehicles that often means the transmission falls back to harsh, protective operation and may refuse normal upshifts until the speed-data problem is fixed.

Fast triage

Start here before chasing parts

  • Scan first: save freeze-frame and pending codes before clearing anything.
  • Confirm the complaint: compare the stored code with current drivability symptoms.
  • Use context: trims, live data, and related codes usually narrow the fault faster than guesswork.
  • Work simplest to hardest: leaks, connectors, maintenance items, and known patterns before expensive components.
Initial checks

What to check first

  • Verify on live data that output speed is truly absent.
  • Inspect connector and harness condition before assuming an internal rebuild is needed.
  • Note whether the vehicle is locked in one gear or refusing normal upshifts.
Driving risk

Can you keep driving?

P0722 often triggers protective shifting or limp mode. If the vehicle is stuck in one gear or hitting shifts hard, avoid normal driving until the output-speed signal is restored.

High urgency: If symptoms are active, reduce driving and diagnose quickly before secondary damage builds.
Likely causes

Common causes behind this code

  • Completely failed output-speed sensor
  • Open circuit, disconnected harness, or terminal damage
  • Fluid intrusion or corrosion at the transmission connector
  • Internal harness or valve-body mounted sensor failure
  • Physical target-wheel damage preventing signal generation

Cause phrases often tied to this code: dead output speed sensor, open OSS circuit, broken harness, connector unplugged, no output speed reading.

Diagnostic order

Suggested workflow

  1. Check for P0700, P0720, ratio codes, or ABS/vehicle-speed related companions.
  2. Watch output-speed data during wheel movement or road test if safe and compare it with vehicle speed.
  3. Test circuit integrity and sensor operation based on the transmission design.
  4. Inspect the case connector and internal harness paths for oil or water intrusion.
  5. After repair, verify the TCM again sees output speed and that normal shift strategy returns.
Avoid guesswork

Common mistakes

  • Treating P0722 like a random glitch when the signal is actually gone.
  • Replacing solenoids because the shift complaint is loud, while ignoring the missing output-speed data that explains it.
  • Skipping live-data confirmation before teardown.
Repair path

Practical fix guidance

  • Fix the no-signal condition first because the TCM cannot make reliable shift decisions without output-speed feedback.
  • Prove whether the failure is external wiring, sensor, or internal harness before opening the transmission.
  • Retest shift quality and ratio calculation once the signal is restored.
Vehicle context

Affected brands in this MVP

Brand hubs help broaden internal linking now and can evolve into make-specific diagnostic notes later.

Aliases and common searches

English phrases tied to P0722

Useful when the driver knows the wording but not the exact DTC yet.

  • output speed sensor no signal
  • OSS no signal
  • no output shaft speed signal
Related search intent

Queries this page can answer naturally

  • P0722 code meaning
  • what does P0722 mean
  • output speed sensor no signal symptoms
  • no OSS signal
FAQ

Quick questions about P0722

What is the difference between P0720 and P0722?

P0720 is a broader circuit malfunction, while P0722 means the TCM effectively sees no output-speed signal at all.

Can P0722 cause limp mode?

Yes. Missing output-speed data often forces the transmission into a protective strategy.

Should I keep driving with P0722?

Only minimally. Harsh shifting and fixed-gear operation can add extra stress and leave you stranded.