Honda 2006 CR-V Backup Sensors User Information page 15

Troubleshooting
Troubleshooting With Beeps
When you turn the ignition switch to ON (II), and the
backup sensor signal sounds more than once, there
may be a problem with one of the sensors.
Corner Sensors
Two slow beeps: right sensor is faulty.
Three slow beeps: left sensor is faulty.
Four slow beeps: right and left sensors are faulty.
Center Sensors
Three fast beeps: one or both sensors are faulty.
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