TORQDEX // POWERTRAIN DTC
Output Speed Sensor Circuit Malfunction
A fault has been detected in the transmission output speed sensor circuit.
00 // CODE DEFINITION
What P0720 means
P0720 indicates that the transmission controller cannot reliably determine transmission output-shaft speed.
The output sensor, wiring, reluctor, internal transmission condition, or module may be responsible.
01 // COMMON SYMPTOMS
What you may notice
02 // COMMON CAUSES
What can trigger P0720?
Output speed sensor fault
The sensor may fail or produce an intermittent signal.
Harness or connector problem
Damaged wiring or poor terminal contact may interrupt the signal.
Trigger-wheel problem
Damage or excessive clearance may affect sensor output.
03 // DRIVEABILITY
Can I keep driving with P0720?
Driving may be limited by incorrect shifting or limp mode. Avoid extended driving if the transmission is slipping, shifting harshly, or unable to select the proper gear.
04 // DIAGNOSTIC ORDER
Start here
Review output-speed data
Verify that output speed changes logically with vehicle speed.
Inspect the circuit
Check wiring, terminals, and routing near the transmission.
Test the sensor signal
Evaluate resistance or waveform based on sensor design.
Compare related speed data
Compare output speed with vehicle speed and transmission input speed.
05 // COMMON REPAIR AREAS
Systems commonly involved
These are common areas associated with P0720. Testing should confirm the actual fault before parts are replaced.
Output speed sensor fault
The sensor may fail or produce an intermittent signal.
Harness or connector problem
Damaged wiring or poor terminal contact may interrupt the signal.
Trigger-wheel problem
Damage or excessive clearance may affect sensor output.
06 // DIAGNOSTIC PRINCIPLE
Confirm the fault before replacing parts
P0720 identifies a condition detected by the vehicle control system. It does not automatically identify one failed component. Test the affected system before replacing parts.
07 // RELATED TORQDEX DIAGNOSTICS
Related diagnostic guides
Continue troubleshooting by symptom and system. These TorqDex guides cover common diagnostic paths associated with this trouble code.
08 // RELATED CODES