Starting difficulty due to defective anti-theft control module on Kia Sedona

Difficulty starting the vehicle may be caused by a defective vehicle immobilizer (anti-theft) control module.
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Average mileage: 96,453 (12,000–172,000)
11 model years affected: 2002, 2003, 2004, 2005, more2006, 2007, 2008, 2009, 2010, 2011, 2012
57 people reported this problem
37 people shared problem details
2006 Kia Sedona85,000
Turn the key and car won't start. No noise at all from engine trying to turn over. All electrical devices work though, radio, lights etc. Usually have to lock and unlock doors to reset anti theft system, then have to hold key in start position for a few seconds before it starts
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Been having problems for last six months. Dealer changed anti theft module three weeks ago. Two day later same issue. Returned vehicle to shop following Monday. Dealer had vehicle two days with no issues. They cleaned terminals on starter and swapped relays. Next day I had same issues twice. Worked fine for 1 week. Then last night issue returned. Sometime have to turn key up to 40 times before it will start.
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2006 Kia Sedona81,000
car will start sometimes without a problem. suddenly won't start. dealer confirmed immobilizer control mod.
2006 Kia Sedona89,500
The car starts and runs great but occasionally will not crank. All the proper lights come on the dash, everything else works fine but no crank. It may crank again on the next attemt or not for 10 -20 min. Some blogs say to thump on the relays in the cabin fuse box or the engine compartment fuse box. I have done so and had no luck but then suddenly it will crank and start. I have no clue if the thumping helps or if it is just coincidental.
van won't start have to keep clicking till it will turn over i believe it's in the theft system because it doesn't work anymore
Last November this happened for the first time - turned key, lights all on, engine did not turn over at all. Dealer said poor connection to starter removed, cleaned and re-secured both + & - cables. Van was fine until mid July. Same problem. Dealer replaced relay, still didn't start, now does intermittently. Dealer claims no knowledge of this easily findable problem with the Vehicle Immobilizer Control Module. Huh? Reports been going on for last 10 years!
2006 Kia Sedona60,000
Issue starting mini van. Have repair contract. Kia dealership says they know nothing about this issue and can not fix it until it happens in shop.
2006 Kia Sedona107,000
Some web site says you have to bang hard and sharply on the area near the fuse box. Sounds weird as a solution, but it works.
2006 Kia Sedona150,000
intermittent for a while now. First work around was taking out and/or pushing in the alternator fuse under dashboard, worked for a while then stopped working. Found work around on youtube where i can go to fuse box under hood, take off grey start relay cap, make contact and car starts every time i do this. But inconvenient and no fun in below freezing temperatures.
2006 Kia Sedona80,000
not repaired.weird pain in the neck.
2006 Kia Sedona109,000
My '06 well-maintained Sedona is randomly refusing to turn on despite having replaced the battery 5 weeks ago. When I turn the key, all electrical systems are fully functioning but the engine is completely silent. Both times this has happened, it has self-resolved after about 20-30 minutes. Alternator checks out totally fine. Dealership stumped. I will be printing out this thread and taking it in to them. Thanks for the help!
Immobilizer started
2006 Kia Sedona91,000
Installed jumper to bypass anti-theft
Mine won't start unless in neutral, so if I'm parked on a hill, like in my driveway, I can't get it to start at all.
2004 Kia Sedona172,000
Key won't go into ignition car ignition is locked
2006 Kia Sedona93,000
The last 3 months everything works, but won't start had towed to garage sat overnight worked perfectly for 30 days. Did it again went to get it towed and when they went to pull it on to truck it started, August 21st did it again waited for tow truck, he gets in and it started right up.
Once the key is inserted, the car will NOT start. The lights will work and so will the windows, etc. After a number of tries, it will start, thus far. This happened three times today. It's really scary. I'm wondering what others did to fix this issue. Someone suggested it may have something to do with the anti theft device. I don't know what to do.
This had been a recurrent problem @ a 2 years ago happening off/on for months. Then - it was fine until - yesterday when it out of nowhere again would not start after having started fine earlier that day. Tried locking/unlocking doors. Tried getting out of vehicle, locking it, re-entering a minute later which had worked before - no luck. Then on the umpteenth try it just started. Really annoying and the only problem this otherwise great vehicle has ever had!
2005 Kia Sedona143,000
I'm having the same problems due to the anti theft device I can't figure out how to fix. What can I do
2006 Kia Sedona50,000
I had the same exact problem with my van not starting when it felt like it. Let sit for 30 mins, would start fine. Usually right after I bought ice cream or milk. Took it to numerous dealers and repair shop, it would never do it for them. Replaced the battery, and many other parts, finally had to replace the entire computer in the dash. Total of all the repairs and replacements around $1500. Have not had the problem again since. That was almost 2 years ago.
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