P0721
Output Speed Sensor Circuit Range/Performance
2003-2003 Suzuki Aerio 2.3L I4
Moderate SeverityPowertrainGeneric (SAE)
The 2003 Suzuki Aerio is equipped with a 2.3L inline-4 engine. Below you'll find detailed p0721 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Output speed sensor signal out of range.
Symptoms
- Erratic speedometer
- Shift problems
Common Causes
- Sensor fault
- Tone ring issue
Diagnostic Steps
- Compare to wheel speed signals
- Test sensor
Repair Notes
Replace sensor.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0721 on Other Vehicles
Common Questions
What does code P0721 mean on a 2003-2003 Suzuki Aerio?
P0721 stands for "Output Speed Sensor Circuit Range/Performance". Output speed sensor signal out of range.
What are the symptoms of P0721 on a Suzuki Aerio?
Common symptoms of P0721 include: Erratic speedometer, Shift problems.
What causes P0721 on a 2003-2003 Suzuki Aerio?
Common causes of P0721 include: Sensor fault, Tone ring issue.
Last updated: March 2026