serb

Hey guys,i have a weird problem,the other day i tried to start the car and it would crank but wont start,it would give me following codes:
voltage low,(12.4v with car off)
throttle actuator range performance bank 1
internal control module fuel injector control performance
control module performance
after 1/2 hour on the charger it started like nothing happened,then tommorow morning it would start on 2nd attempt,
today i bought a battery tester and tested the cranking battery and alternator at jump points in engine bay,it would show battery is bad(1.5 years old exide agm 10kkm on it),i went and bought another battery and when i took the old one out i tested it and it would say its good,also tested a brand new one at jump points and it would say its bad,
anybody had similar problem?
i think i need to trace wires to see when it is maybe broken

serb

sxit now it wont even crank

Joshinator99

I’d be taking a close look at the cleanliness of your ground connections and battery terminals.

serb

where do i look for ground connections? its getting numerous shorting codes

serb

charged the battery in full,still nothing,it will turn on but no crank,i got about 20 ecu codes,my ecu might be dead

serb

took the starter relay out and back and mothaphucker started but still showing my battery is bad when measured at jump terminal,gonna go to a shop tommorow