Check Engine and strange code - Kia Forum
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#1 (permalink) Old 10-29-2007, 04:51 PM
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Question Check Engine and strange code

We have an '03 Sedona with almost 80k miles on it. About a week ago, the CEL came on. My wife brought it to Autozone and a sales associate with a marginal grasp of how to use the scanner read out several codes. One was related to the gas cap and one mentioned the O2 sensor. I never did get any numbers.

I called our local Kia dealer who told us just to drive it for a few days to see if the error cleared on its own. When it hadn't after a week, I called them back and brought it in for them to read it. After a $90 diagnostic fee just to plug in their computer, they told me it came up with a code they'd never seen before. It took several hours with Kia to get a troubleshooting tree, and by the time they got it, it was the end of the day, so now I need to bring it back.

The two codes are P0456, "Small Evap Leak," which I know could be the gas cap. Their mystery code is P1159, which they list as "Variable Induction System."

Has anyone ever seen this code, and what was the resolution? I know my way around an engine, but I haven't ponied up the $150 to buy a shop manual for this car yet. Thanks.

Ken
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#2 (permalink) Old 12-05-2007, 08:58 PM
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Better late than never, maybe this will help someone:

I got a obdii code: P0456

I reset it and will see if it will return. I did retighten the gas cap too.

In my Kia Sedona service manual (hard copy). Here are the trouble areas...

Codes P0442, P0455, and P0456 you need to look at the following areas:
  • Fuel filler cap loose or missing
  • Fuel filler cap o-ring missing or damaged
  • Faulty or damaged fuel filler pipe
  • Leaking,, disconnected or plugged fuel vapor lines
  • Fuel in lines due to faulty Rollover Valve (RV), On-Board Refueling Vapor Recovery Valve (ORVR valve)
  • Canister close valve clogged, stuck open or closed
  • Improperly installed purge solenoid valve (PSV)
  • PSV stuck open/closed
  • Faulty fuel tank pressure sensor
  • Leaking canister or catch tank
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#3 (permalink) Old 07-01-2008, 12:52 AM
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any updates on this? i got a p0456 the other day.

also noticed my gas mileage is really bad. 70 miles and I'm most of the way to half a tank!!!

-joel
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#4 (permalink) Old 07-04-2008, 12:34 AM
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the variable inductions system is the middle part of the intake manifold(sub valve assy.) that is were the eeror is occuring
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#5 (permalink) Old 08-06-2008, 08:52 PM
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Hey,
I am new on this forum. I have a problem that may be related. My wifes Kia Sedona (2004) will run fine for a while and all of a sudden we will be driving and it starts jumping like it is running out of gas. I have a service engine light on some times. The code has been read as a purge valve problem. Where do I locate the purege valve and how hard is it to replace?

Mark
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#6 (permalink) Old 12-30-2008, 07:00 PM
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Default p1159 & p0122 '04 Sedona

My light came on today, and also went to AutoZone fora scan... my results for that mystery code 1159 is different though... I was told "Variable Intake Manifold Motor Circuit Malfunction" as well as p0122 being my throttle positioning sensor.... my father is a mechanic, but lives 8 hrs away, told me that most likely it is a loose connection from vibration... I am gonna have the code cleared and see if it returns.. my car seems to be running fine and my dad said not to worry.
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#7 (permalink) Old 12-30-2008, 07:09 PM
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Default Quick Question Though...

I WOULD be interested in knowing if by chance someone who knows is reading this, if these things could effect my gas mileage, and if one could be causing the other.... Thanks!!
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#8 (permalink) Old 01-30-2009, 11:13 PM
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Exclamation Can Someone please help?

*bump*

hoping to get some help... I'm having problems with it stalling out when going into passing gear now....

Does ANYBODY know what those trouble codes could mean? WHERE are those components?

PLEASE??
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#9 (permalink) Old 02-01-2009, 05:50 PM
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KIA use (as do many other manufacturers) the variable intake on their V6 engines.
It is a bosch developed idea that has an actuator which turns a vane inside the manifold creating either short runners or long runners for the air to flow into the head. The long runners help torque and HP at High rpms whereas the short runners help at lower rpms. The computer positions the vane by a stepper motor to the required position.
The actuator is underneath on one end of the manifold plenum chamber, you may need to clean or replace that item.
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