P0720
High SeverityOutput Speed Sensor Circuit
Transmission System
What Does P0720 Mean?
No signal from the transmission output speed sensor.
Common Fix
Replace output speed sensor
Estimated Cost (DIY)
$20 - $60
Symptoms
- ⚠️No speedometer
- ⚠️Harsh shifting
- ⚠️Limp mode
Common Causes
How to Diagnose P0720
- 1Check sensor connector
- 2Test sensor
- 3Replace sensor
OEM Diagnostic Flowchart
Scroll to load technician if/then branches.
Read live data and freeze frame for P0720 to pinpoint the cause before buying parts.
Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0720.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Legacy F6-3.6L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair manu...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Outback F4-2.5L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair man...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Outback F6-3.6L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair man...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Tribeca F6-3.6L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair man...
Exact Vehicle Hubs
Browse →Open the exact vehicle hub grounded by OEM manual evidence related to P0720.
Open the exact vehicle hub grounded by OEM manual evidence related to P0720.
Open the exact vehicle hub grounded by OEM manual evidence related to P0720.
Open the exact vehicle hub grounded by OEM manual evidence related to P0720.
Related Codes
No signal from the transmission input speed sensor.
The ECM is not receiving a proper vehicle speed signal. Affects speedometer, ABS, and transmission shift points.
The TCM (Transmission Control Module) has detected a fault and sent a message to the ECM. This is a general indicator that transmission-specific codes are stored.
Frequently Asked Questions
- Is the output speed sensor the same as the vehicle speed sensor?
- On some vehicles, yes. On others, they are separate sensors.
- Can this affect the speedometer?
- Yes — the output speed sensor is often used for speedometer calculations.