2006 Nissan altima engine codes P0720 2006 Nissan Altima - Engine-Codes.com Possible Causes and Repair Information for P0720 2006 Nissan Altima code. P0720 2006 Nissan Altima Vehicle Speed Sensor. (or Service Engine Soon... Source Source Source Source Source Source Source Source Source Source Read Also: Code p0720 nissan altima 2002 Nissan altima code p0720 Nissan error code p0720 2006 Nissan altima p0720 P0720 nissan altima P0720 output speed sensor circuit malfunction nissan sentra