Similar problem, 07 KIA Sedona, ECS OFF lite and check engine lite on at all time but with no acceleration or Deccerleration issues. Took if for Diag scan at local Auto parts store. Scan came up with "Brake Switch A/B correlation problem". Solution 1. Open or short 2. Poor connection 3. Faulty Brake switch. I assumed it would be ok to drive since ECS OFF lite is on and I have a switch that allows me to turn the ECS off. Not sure how true that is but have been driving it since this morning. Havent had a chance to trouble shoot yet. Any new insight would be welcome. Thanks

SOURCE: 2003 kia sedona engine turn but no start

That sounds like the started1

SOURCE: #1 cyl. misfire under load

the best thing i can think to do in you case is find out if you are loosing the 12v (unlikely) or the ground (more likely) one side of the injector will have a constant 12v. if the 12v is dissapearing under the load then just snip the wire and tie into one of the other injector feeds. they should all share the same fuse anyhow. if it is the groung pulse dissapearing just snip the wire by the injector and the computer and run a new one. shure it might look funny outside the loom but it eliminates all other possibilities. if the problem persists then you are looking at a connector fault or computer.seeing that you have replaced everything else this should get you back on the road. feel free to write back if you have any questions.. dustang

SOURCE: 2002 Kia Sedona new battery & alternator car dies while driving

hey buddy the same that happeanto me, its your alternator dont make any one give you the run a around alternator for sure. i got my alternator from gb500 it cost about $160.00 after tax.

SOURCE: Have a kia sorento ex 2004 automatic diesel 2.5.

Try changing the fuel filter

SOURCE: my check engine light keeps coming on on my 2004 kia optima lx

Check with the place that checked the codes for you. Maybe they can test the IG sensor for you. That might help. Otherwise check all the connections relating to the sensor.