I am getting a code 34 for the map sensor voltage low. I have checked the wires at the sensor and at the computer. There isn't any problem with wires in either place. Is there any other wires that I need to check or find?

 

replace the MAP and see what happens.

 

the map sensor tested good

 

Is your truck running erratically? Try cleaning the contacts between the wire and the sensor? Maybe a lil electrical grease? That would be my first attempt...

 

Have you checked the wiring between the MAP sensor and the ECU?

 

yes, i have and I am still getting a weak signal

 

What is the voltage being sent to the MAP sensor from the ECU? It should be +5V if I remember correctly. If this varies at all during operation, you either have a wiring problem or an ECU problem.