the ses its back on...

 

See you spoke to soon... it must have been on Vacation...

 

i been having the same prob ever since dealer put a new tranny in,got the truck back and it ran better than new then a few days later check engine light and it runs doggy off the line again,run a scan with my preditor and it gives me p0133 bank 1 sen.1 slow response and p0446 so i put in a new 02 still got the code then go fill up and the cap made the loud vacum when i loosened it,kept kicking the the gas pump off,was my 02 sen. ok and the evap code triggered it,is this coverd under warranty i got like 2 months left?

 

If it made a hiss like your tank was under heavy vacum, your vent solinod must not be opening and closing properly. Your fuel pump also has a pressure sensor on it and it may not be reading the proper value...

If there is to much vacum in the tank it will cause performance issues. Believe me, I have done this on my own truck. I comanded the evap system to pull excessive vacum in the tank while on a test drive. It started to sputer and nearly died before the test shut down.

As far as the 02 sensor they either work properly or they don't. With out seeing what the rest of the system is doing and knowing some other variables its hard to say for sure. could be as simple as a loose wire at the conector or it could be more complectied such as a fuel delivery issues on that side of the motor.

I would say it is more of a coinsadence that this happened since they only did the transmission.

If you still have a factory warranty on the vehical it should be covered. if its a warranty on the trans then no.

 

thanks, i still got 2 months on the factory warranty so ill drop it off with them let them deal with it,it definitely runs like a dog now.

 

My truck is throwing code P0446 now, its a 09 5.3L. The dealership wants to charge me $395 to fix the problem. Anybody have any info on fixing this problem ?