Trouble code P1138 means: Swirl Control Valve Control Performance
swirl valve is located cloce to throttle body has two vacuum tubes
swirl control valve/solenoid control valve malfunction
Swirl Control Valve Control Vacuum Switch
Swirl Control Solenoid Valve
swirl control valve problem.
P1131 swirl cont sol/v
The sooooo called "Swirl control valve" on most nissan sentra's depending on your geog.. Loc..(ca. Especially) looks quiet differently From even one year apart hince, your region of the country. None the less, the power actuator is located at the driverside intake. It is mounted with usually brass colored bracket onto the intake. Its primary function is to monitor/maintain "Air-2-fuel" stricly governed By the vehicles ecm.
P1130 code which reads something like "Swirl Control Valve Solenoid Control"
where is the pcv valve located on a 2003 Nissan sentra
where is PVC valve located on 2002 Nissan sentra
bring it to transmission shop