Home › Fault codes › P0722
P0722 — Output speed sensor — no signal
SerioustransmissionPower derate likely — plan to stop soon
Output speed sensor — no signal. Common causes: Failed sensor|Open wire|Missing tone wheel.
Don't risk it — get a diesel tech on the truck.
Look up listed providers near you and give them this code when you call.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Failed sensor
- Open wire
- Missing tone wheel
First moves (roadside)
- Resistance check
- Inspect wiring
FAQ
What does P0722 mean?
Output speed sensor — no signal. Common causes: Failed sensor|Open wire|Missing tone wheel.
How serious is P0722?
Serious — Power derate likely — plan to stop soon.
What's the most likely cause of P0722?
The most common cause is: Failed sensor. Other possibilities include Open wire; Missing tone wheel.
Can I keep driving with P0722?
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
Find a mechanic or related guides
General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.