Help: Weak batteries

[aggar]

Will weak batteries cause a Po659 and PO700 codes to pop up when starting? My truck had been sitting for about 3-4 days outside in 20-30* weather and last night I started it to go to town and it was a little weak starting. Would this cause these codes to trip or is there something else wrong?

 

[aggar]

No ideas?

 

[Rikter]

To fry or not to fry

Don't know about the codes but those weak batts will strain the starter & alt. And that is the holy trinity of elec fails. If one is bad the others will be soon too. Plus your ECM needs a minimum voltage level to operate properly. As do some of the transducers. New batts are a good investment. Gelcells are very rugged.

 

[stacks04]

cant say for sure. the 2 codes are tcm related. the first code if related to the power circuit that powers the tcc and pressure solenoid. i will say this, weird things happen because of low batteries. i would swap em and then go after the others if the said codes return. i doubt they will though