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#1 (permalink) Old 10-14-2010, 01:10 AM
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Default Error Code P0343

I have a 2006 Kia Sorento that I am having fun with all of a sudden. The other day it decided it would not start, it would turn over but would not catch, like it was out of gas or no spark. While trying to get it to start the battery totally died, jump started it and it ran fine to the auto store, found out it had only 70 cold cranks. Replaced battery and it started and ran fine. Went back 6 hours later and once again it would not start, acting like it did before. Checked fuel pump and it seems to be working, then later I received P0343 code, crankshaft position sensor circuit high input. Followed testing procedures for Signal Circuit Inspection for that error and instead of having 5V had about 11V, and ohm check was not infinity but about 3 ohms? What does that mean replace the ECM? Also question about the fuel pump, when we disconnected the fuel line at the pump and turn the key to the "on" position it does not pump, turn it to the "start" position and it works, that does not sound right to me. Also one time after hooking back-up the fuel line it started and ran fine, turned off and it would not turn back on again. Don’t understand it, it seems to not have a pattern to it, does anyone have electrical schematic for this vehicle, including the fuel pump? Any help would be appreciated, thanks. Will be checking out the timing belt soon, and is there a way to check if the sensor is bad?
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#2 (permalink) Old 10-14-2010, 10:11 AM
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P0343 is camshaft position sensor, not crankshaft. just replace it. It's easy to find - left bank(driver side) remove upper timing belt cover.

bottom picture is camshaft sensor
http://www.kiatechinfo.com/viewer/di...G/lbcd001a.gif

Last edited by maksik; 10-14-2010 at 10:14 AM.
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#3 (permalink) Old 10-14-2010, 10:21 AM
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Yes thank you I did mean Camshaft Position Sensor
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#4 (permalink) Old 10-14-2010, 10:42 AM
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If it was crankshaft sensor I wouldn't say it's easy
Replace it. sometimes checking sensors doesn't give you proper info. I've had sensors telling me it's good, but on car it's not.
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#5 (permalink) Old 10-14-2010, 01:45 PM
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The thing I am worried about is how everything seems weird. I do not want to spent $150 on a part and it still not being the right thing. What about the fuel pump? Is it normal for it to not pump when the key is in the on position? And what about the weird voltage reading on the harness connector side ( I am assuming that this is the EMC side not the sensor side of connectors) of the CMPS. Any thoughts?
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#6 (permalink) Old 10-14-2010, 03:43 PM
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Originally Posted by godjams View Post
The thing I am worried about is how everything seems weird. I do not want to spent $150 on a part and it still not being the right thing. What about the fuel pump? Is it normal for it to not pump when the key is in the on position? And what about the weird voltage reading on the harness connector side ( I am assuming that this is the EMC side not the sensor side of connectors) of the CMPS. Any thoughts?
Pull the RED 10amp mini fuse for the ECM in underhood box for a min and then put back in. Should be marked ECM/ECU. It as well should be in the number 4 or 5 mini fuse slot? As you stand at the left front fender on side (by wheel) and look in left to right top to bottom. See if it starts and runs then. If you like pull both the 4 and 5 and and let the ECU and P/TRNS both relearn if it then runs. Tell us what you find.
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#7 (permalink) Old 10-14-2010, 11:21 PM
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Originally Posted by 04SorentoLX View Post
Pull the RED 10amp mini fuse for the ECM in underhood box for a min and then put back in. Should be marked ECM/ECU. It as well should be in the number 4 or 5 mini fuse slot? As you stand at the left front fender on side (by wheel) and look in left to right top to bottom. See if it starts and runs then. If you like pull both the 4 and 5 and and let the ECU and P/TRNS both relearn if it then runs. Tell us what you find.
Isn't that the same as disconnecting from the battery? Already did that.


Ok to continue my fun journey, today I went back to where I left the car so that I could get it towed, and guess what, it started right away without a problem. FRUSTRATING. I turned it off because I was FRUSTRATED with it, and then thought "Oh I should of left it on so that I can pull it out for the tow truck." So I started it again, and it started with no problem. Had it towed home and when it got there I started it again, with no problem, to pull it into the driveway. Did I already say FRUSTRATING. Decided to see what the codes were saying and guess what? Error code P0343 was gone and now P0342 was there, and no I did not reset, erase the codes, FRUSTRATING.

Error code P0342 is Camshaft Position Sensor A Circuit Low Input. So as FRUSTRATED as I am I rest the codes, and no problem, starts and runs fine. Also to let you know that since it is working again I decided to check the fuel pump with the ignition in the "on" position and the car not running and the pump does NOT run, so for all you people that wanted to know. Will still check the TB and Camshaft Position Sensor later and I still do not trust it to drive anywhere.

I will be back to let you know the status

Thanks everyone
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#8 (permalink) Old 10-15-2010, 10:13 AM
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Isn't that the same as disconnecting from the battery? Already did that.


Ok to continue my fun journey, today I went back to where I left the car so that I could get it towed, and guess what, it started right away without a problem. FRUSTRATING. I turned it off because I was FRUSTRATED with it, and then thought "Oh I should of left it on so that I can pull it out for the tow truck." So I started it again, and it started with no problem. Had it towed home and when it got there I started it again, with no problem, to pull it into the driveway. Did I already say FRUSTRATING. Decided to see what the codes were saying and guess what? Error code P0343 was gone and now P0342 was there, and no I did not reset, erase the codes, FRUSTRATING.

Error code P0342 is Camshaft Position Sensor A Circuit Low Input. So as FRUSTRATED as I am I rest the codes, and no problem, starts and runs fine. Also to let you know that since it is working again I decided to check the fuel pump with the ignition in the "on" position and the car not running and the pump does NOT run, so for all you people that wanted to know. Will still check the TB and Camshaft Position Sensor later and I still do not trust it to drive anywhere.

I will be back to let you know the status

Thanks everyone
Yes that is the simple way to think of it but not always correct.

1)battery went dead, they installed new one? or they just trickle charged it right. Either way it was disconnected as you say. Are you assuming that was the "I disconnected it"? No it is not that as you had trouble AFTER that or did you do it twice and one once was after the trouble and codes popped up. That was not what you said. PULL FUSE not battery disconnect. More so after this new update this should be done.

2) this will clear codes and reset system. Then see if it still starts like it does now for you. Let it set new codes then, IF AT ALL. And forget about the OLD ghost codes ones you got now. See what it tells you NOW. If at all anyting. If it does not trip the CEL do not get all caught up in this, like you are now. Nothing is now wrong. And forget the idea the pump does not work like you think it should thing when you play with it as you are. It will not work yes. If the vech is NOT running it will not PUMP gas. As that is a safety measure one of many built into the ECM/vech so it does NOT if the vech crashed and shuts down no more fuel pumping out into the fire it is now on. Or you get a fuel leak and the vech shuts down and stops running. If the pump/ECM does not get a few things meet it will not cue the FUEL PUMP RELAY to make the pump work or keep the vech running. No crank sensor, nor cam sensor, or TPS or other things tell it that the vech is infact running. You will get you a dead pump from a fuel leak or crash unless you jump and bypasss the whole system and hard wired the pump directly. And that is a very UNWISE idea too. That is why it will pump you found in the CRANK position. It starts and gets the signals then and keeps running. If not it goes dead. Thier is a moment of switch over form the start to run mode for the pump too. I think you get the idea now right?

Pull the fuses and see what it does and tells you in a few days. My guess is it will tell you nothing as the system is fixed. And will not set new codes or trip the CEL again. But if it does or it just plain stopps starting again and goes dead, then you know for sure what is going on now and stop guessing. SCAN GAUGES are nice and useful. But they are not some sorta magic pill or cure. HARD BOOTING the system will tell you and get you more.

Pull just the TWO fuses and not the cables. And do not let teh vech jsut sit there this weekend til you have to taske it to work monday. USE it these weekend and see if it conks out when your NOT at work or on the way to work and can deal with it with out the time restraints or 70 miles form home.

P.S. I understand your uneasiness or not wishing to drive it. But you have to, to make sure it will stay running which it should do now. Or just sell it. Try to get away form the idea of worring about what COULD go wrong based on PAST. And more like what IS or did go wrong if and when it ever stops on you again. Do not look for trouble and do nothing as it might happen. Drive it and deal with it if it does. Or get that promotion at work and start working form home, problem solved right?

Last edited by 04SorentoLX; 10-15-2010 at 10:33 AM.
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#9 (permalink) Old 10-16-2010, 12:43 AM
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Ok to add to my story, I was not able to do much today except see if it would start, and first thing this morning, no problem started up. Returned this afternoon about 4 p.m. and it did not start, error code P0343 (I don't get it). And now once again at 10:30 p.m. and it started no problem, but still showing code P0343, fun, fun, fun. Will work on it tomorrow and let you know what I see
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