So I picked up a truck with just a few problems... 11 DTC codes. Trying to figure out where to start. The truck runs and drives and everything seems to work fine.
2008 Lariat crew 4x4 5.4L only 98K miles. New battery yesterday truck was sitting with dead battery for a while before that. Voltage was 11.8 today, truck starts no problem.

2 DTC's from traction control module
B1676-20 Battery voltage out of range
C1222-20 speed wheel mismatch

1 DTC from Instrument Cluster
B1352-60 Ignition Key in circuit Fault

2 DTC's from PCM
P0345-FF Camshaft Position Sensor A circuit (bank 2)
P0349-FF Camshaft Position Sensor A circuit intermittent (Bank 2)

2 DTC's from Electronic automatic temp control
B2796 Driver solar radiation circuit open
B1676 Battery Voltage out of range

3 DTC's from vehicle security module
B2872 Tire pressure sensor fault
B1318 Battery Voltage Low
B2425 Remote Keyless entry Fault

1 DTC from restraint Control Module
B1318 Battery Voltage Low

 

Sounds like a lot of battery related stuff. I'd clear the codes and start fresh. I guess unhooking the battery for awhile will clear them but I'm not positive.

 

If you installed a new battery and it’s now only reading 11.8 vdc.. you may have a bad alternator.. our voltage regulators are notorious for going wacko.. read power on the battery with engine running.. should see 14+vdc. Is your battery light on ?

 

Compare your readings on a battery system on good vehicle . If its running and not above 14 vdc your charging system in trouble that includes all corroded and dirty connections to battery . Corrosion can even ruin main battery leads .
No sense going after codes with bad voltage readings .