On Board Diagnosis Logic

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

This is an OBD-II self-diagnostic item.
Diagnostic trouble code "VHCL SPEED SEN-A/T" with Consult-II or P0722 without Consult-II is detected under the following conditions.

When signal from revolution sensor does not input due to open, short, and so on.
When unexpected signal input during running.