How do I locate the Engine Speed Sensor on a 2004 Nissan Altima 2.. I had the SES diagnosed stating code po725. However, I have been unable to locate the sensor to check to see if it is just loose or needs to be replaced. The SES light came on, and now I'm having difficulty starting after the engine has been running a while.

SOURCE: 2003 Nissan Altima 2.5S, Check Engine Light Problem.

this problem could be caused by the mass air flow censor, i had the same problem with my car. it is really pricey at the dealer so you might want to check elsewhere for this part. I found one at a scrap yard for 85% less that the dealer and i also got life time warranty, the dealer does not offer any warranty on this part.

SOURCE: PO725 Engine speed sensor circuit malfunction

Trouble Code: P0725


A/T Engine Speed Sensor Circuit Malfunction

Possible Causes:


Check for trouble codes related to the CKP Sensor

CKP Sensor signal circuit open, shorted to ground or to power

CKP Sensor is damaged or has failed (open or shorted)

Intermittent wiring or connector problems

PCM has failed

SOURCE: Where is the speed sensor located on the 2005

It should be on the right front trans axle.

SOURCE: locating the engine speed sensor on an 05 altima

Its on the right front of the transaxle near the right axle flange.

SOURCE: Nissan Altima 2004 SES light and some times engine donot start

its going to be between the motor and tran on the back lower part it is going to be in between a small gap i chande it on my friends car and it work