The truck does not accelerate properly

Question

All seems working fine but the truck when climbing hill for long period of time start to reduce it's acceleration and finally it stops. The Check engine soon ligth is on and the only bad codes are for the A/F sensors.

Answer 1

Depending on the code that are set, they can just be reponding to the sluggish running condition that the truck has. Start out by check the basic such as the airfilter